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Case Studies

Research pairs and in-depth case analyses. Follow the facts, sources and competing explanations at the length the question needs.

General information and research commentary, not legal advice. Each entry identifies its facts, assumptions and sources.

28 entries · Newest first · Korean original

Research pairCompany law & governanceWith a synthetic case

Does a Director Breach the Duty of Oversight by Approving an Agenda Item After a Board Risk AI Has Flagged Warning Signs?

Republic of Korea · This research pair couples a synthetic case set in 2031–2032 with the actual Supreme Court Decision 2021Da279347 decided May 12, 2022. It keeps three things clearly apart: the holdings and summary of the actual judgment, the current statutes as verified on October 15, 2026, and the synthetic premises adopted for research purposes. The future scenario is a mock analysis that examines the issues on the assumption that the current doctrine remains in place. It is neither the record of an actual case nor individual legal advice.

Taking as its anchor the doctrine on directors' duty of oversight and internal control in Supreme Court Decision 2021Da279347, this study analyses a hypothetical case set in 2032. In that case, a board decision-support AI warned of a risk score indicating that a loan of funds to a subsidiary might prove unrecoverable, yet the board approved the loan without requesting further materials.

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Research pairCustomary law & property rightsWith a synthetic case

If Only the Beneficial Interest in a Building on Land Is Split Up and Sold on a Distributed Ledger, Does Statutory Superficies under Customary Law Still Remain Effective Today?

Republic of Korea · A research pair that matches a synthetic case set in 2031–2032 with the actual Supreme Court en banc Decision 2017Da236749 rendered on July 21, 2022. It clearly distinguishes the Issues and Summary of Judgment of the actual judgment, the current statutes as verified on October 21, 2026, and the synthetic premises adopted for research purposes. The future scenario is a mock analysis that examines the issues on the assumption that current legal principles remain in force. It is not an actual case record or individual legal advice.

Anchored in the legal principle of Supreme Court Decision 2017Da236749, that statutory superficies under customary law still remains effective as a legal norm today unless there is a special agreement to demolish the building, this entry compares a hypothetical case set in 2031. In that case, before the security right over the land was enforced, the building was placed in trust and converted into beneficiary certificates, so that the power of disposition and the registered title were separated.

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Research pairMilitary criminal & justice lawWith a synthetic case

Where flight and communications logs of an operational unmanned system are remotely copied and printed without regard to relevance, does this violate the warrant requirement, and what becomes of the admissibility of the evidence?

Republic of Korea · A research pair that matches a synthetic case set in 2031–2032 with the actual Supreme Court Decision 2020Do10908 rendered on August 14, 2025. It keeps three things clearly separate: the issues and summary of the actual judgment, the current statutes as verified on October 21, 2026, and the synthetic premises adopted for research purposes. The future scenario is a mock analysis that examines the issues on the assumption that current doctrine remains in place. It is neither an actual case record nor individual legal advice.

Taking as its anchor the doctrine of Supreme Court Decision 2020Do10908, which concerns violation of the warrant requirement by indiscriminate printing and copying without distinguishing relevance to the suspected offence, and the admissibility of illegally obtained evidence and derivative evidence, this entry examines a hypothetical 2032 case in which remote ledger logs of a military operational unmanned system and synchronisation records from personal devices were extracted in bulk. It asks how relevance should be distinguished and whether the evidence is admissible.

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In-depth analysisLabor & industrial relations

How Is a Regular Bonus Subject to an Employment Condition or a Days-Worked Condition Assessed as Consideration for Prescribed Work in Determining Ordinary Wages?

This is an in-depth analysis of the case structure. It is based on the holdings, summary of judgment and referenced provisions of the actual Supreme Court en banc Judgment 2020Da247190 rendered on December 19, 2024, which has been made public. The non-public original litigation record was not examined, and the facts and legal principles stated in the judgment are kept distinct from PRO SE's editorial competing readings. Statutes and the judgment text were verified as of October 21, 2026. This analysis is not legal advice on any individual case.

Through Supreme Court en banc Judgment 2020Da247190, this analysis examines the legal principle under which the scope of ordinary wages is determined by the wage item's character as consideration for providing prescribed work, its regularity and its uniformity, rather than by the name of the item or any conditions attached to it.

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In-depth analysisTax & international taxation

Is the Principle of Taxing the Beneficial Owner Excluded in the Interpretation and Application of Tax Treaties? Whether Article 27 (2) Constitutes a Special Provision

This is an in-depth analysis of case structure. It is based on the holdings, summary of judgment and referenced provisions of the actual, publicly available Supreme Court Decision 2016Du841 rendered on June 27, 2019. The non-public original litigation record was not examined. The facts and legal principles stated in the judgment are kept distinct from PRO SE's editorial competing readings. The statutes and the judgment were checked as of October 21, 2026. This analysis is not legal advice on any individual case.

This analysis examines Supreme Court Decision 2016Du841. The Court held that the principle of taxing the beneficial owner applies as such to the interpretation and application of tax treaties, and that Article 27 (2) does not constitute a special provision excluding that principle.

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In-depth analysisCompany law & governance

In What Circumstances Do a Director's Duty to Monitor and Duty to Establish an Internal Control System Give Rise to Liability for Damages?

This is an in-depth analysis of the case structure, based on the holdings, summary of judgment and referenced provisions of the actual published Supreme Court Decision 2017Da222368 rendered on November 11, 2021. The non-public original litigation record and the record finalised after remand were not reviewed, and the facts and legal principles stated in the judgment are distinguished from PRO SE's editorial competing readings. Statutes and the judgment were verified as of October 21, 2026. This analysis is not legal advice on any individual case.

Through Supreme Court Decision 2017Da222368, this analysis traces the scope of a stock company director's duty to monitor and control unlawful acts by the representative director or by other directors in charge of particular business, and the limits of defences seeking exemption from liability.

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In-depth analysisCriminal & investigative procedure

Who Bears the Burden of Proof When the Voluntariness of Voluntary Production Is Disputed?

This is an in-depth analysis of case structure based on the holdings, summary of judgment and referenced provisions of the actual, publicly available Supreme Court Judgment 2020Do9431 rendered on March 12, 2024. The non-public original litigation record was not consulted, and the facts and legal principles stated in the judgment are kept distinct from PRO SE's editorial competing readings. Statutes and the judgment were verified as of October 15, 2026. This analysis is not legal advice on any individual case.

Based on Supreme Court Judgment 2020Do9431, this analysis reads the principle that, where the voluntariness of voluntary production is disputed, the prosecutor must prove matters that dispel doubts as to voluntariness, together with the admissibility of a mobile phone seized in the form of voluntary production at the time of an arrest in flagrante delicto and of the electronic information stored on it.

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In-depth analysisCapital markets & finance

Do Profits Gained from a Capital Markets Violation Include Both Realised and Unrealised Profits? Calculating Unrealised Profits and Determining the Share Price at the Point of Full Reflection

This is an in-depth analysis of case structure based on the holdings, summary of judgment and referenced provisions of the actual, publicly available Supreme Court Judgment 2021Do1143 rendered on September 30, 2021. The non-public original litigation record was not consulted, and the facts and legal principles stated in the judgment are kept distinct from PRO SE's editorial competing readings. Statutes and the judgment were verified as of October 21, 2026. This analysis is not legal advice on any individual case.

Drawing on Supreme Court Judgment 2021Do1143, this analysis examines the legal principle that, in cases of the use of material non-public information, profits gained from the violation include both realised and unrealised profits. It also examines how unrealised profits are calculated and how the share price is determined at the point at which the effect of disclosure of the information has been fully reflected in the share price.

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In-depth analysisEconomic crime

How Is Intent for Occupational Breach of Trust Determined in Financial Support Among Affiliates? — Acts in Breach of Duty and the Scope of Discretion in Business Judgment

This is an in-depth analysis of the case structure, based on the summary of holdings, summary of the decision and referenced provisions of the actual, publicly available Supreme Court Decision 2015Do12633 rendered on November 9, 2017. The non-public original litigation record and the record finalised after remand were not examined, and the facts and legal principles stated in the judgment are kept distinct from PRO SE's editorial competing readings. Statutes and the judgment were verified as of October 21, 2026, and this analysis does not constitute legal advice on any individual case.

Focusing on Supreme Court Decision 2015Do12633, this analysis examines when a loan of company funds constitutes an act of breach of trust in breach of one's duty, and which matters must be considered in determining whether support between affiliates belonging to the same business group was carried out within the scope of discretion of reasonable business judgment.

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In-depth analysisCustomary law & property rights

Whether a Person Who Acquires a Grave-Site Right over Another's Land by Prescription Must Pay Land Rent from the Date the Landowner Demands It: The Boundaries of a Real Right under Customary Law

This is an in-depth analysis of the case structure, prepared on the basis of the summary of holdings, summary of judgment and referenced provisions of the actual, publicly available Supreme Court en banc Decision 2017Da228007 rendered on April 29, 2021. The non-public original litigation record was not consulted, and the facts and legal principles stated in the judgment are kept distinct from PRO SE's editorial competing readings. Statutes and the judgment were verified as of October 21, 2026. This analysis does not constitute legal advice on any individual case.

Centring on Supreme Court en banc Decision 2017Da228007 rendered on April 29, 2021, this analysis examines the legal principle that, where a person installed a grave before January 13, 2001 and acquired a grave-site right by prescription, that person is obliged, once the landowner demands land rent, to pay land rent from the date of the demand.

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In-depth analysisCustomary law & property rights

Whether Statutory Superficies under Customary Law Remains in Effect When Land and a Building Owned by the Same Person Come to Have Different Owners: Whether It Subsists as a Legal Norm

This is an in-depth analysis of the case structure, prepared on the basis of the summary of holdings, summary of judgment and referenced provisions of the actual, publicly available Supreme Court en banc Decision 2017Da236749 rendered on July 21, 2022. The non-public original litigation record and the record finalised after remand were not consulted, and the facts and legal principles stated in the judgment are distinguished from PRO SE's editorial competing readings. The statutes and the judgment were verified as of October 21, 2026, and this analysis is not legal advice on any individual case.

Centring on Supreme Court Decision 2017Da236749, this analysis examines the legal principle holding that the customary law under which, where land and the building on it that were owned by the same person come to have different owners through sale or otherwise, the owner of the building acquires statutory superficies unless there is a special agreement to demolish the building, still remains in effect as a legal norm today.

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In-depth analysisMilitary criminal & justice law

Whether Printing Documents and Copying Files Without Regard to Relevance to the Suspected Offence in the Search and Seizure of Electronic Information Violates the Warrant Requirement: Standards for Excluding Illegally Obtained Evidence

This is an in-depth analysis of the case structure, prepared on the basis of the summary of holdings, the gist of the judgment and the referenced provisions of the actual, publicly available Supreme Court Judgment 2020Do10908 rendered August 14, 2025. The non-public original litigation record and the record finalised after transfer were not consulted. The facts and legal principles stated in the judgment are kept distinct from PRO SE's editorial competing readings. Statutes and the judgment were verified as of October 21, 2026, and this analysis does not constitute legal advice on any individual case.

Focusing on Supreme Court Judgment 2020Do10908 rendered August 14, 2025, this analysis examines the standards under which printing documents or copying files from a storage medium or its copy, without regard to relevance to the suspected offence, in the search and seizure of electronic information constitutes an unlawful seizure, together with the standards for determining the admissibility of primary evidence and of derivative evidence (fruit of the poisonous tree).

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In-depth analysisPublic & administrative law

Must an agency's interpretation be respected because the statute is ambiguous?

A Case analysis limited to the official written decision in Loper Bright Enterprises v. Raimondo (No. 22-451), decided by the Supreme Court of the United States on June 28, 2024. The lower-court Records were not consulted. Because the decision is long, only the opening portions of some opinions were read. It addresses the decision's meaning within United States law and does not compare it with Korean law. The text of the decision was checked as of 2026-10-07.

This article examines the reasoning by which the Loper Bright Enterprises decision overruled Chevron. Tracing the dispute over Atlantic herring observer costs, it sets out the Court's interpretation of the Administrative Procedure Act and its analysis of whether to retain precedent.

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In-depth analysisRehabilitation & bankruptcy

Can a court discharge the Sackler family, which did not go bankrupt?

A Case analysis limited to the official written decision in Harrington v. Purdue Pharma L.P. (No. 23-124), decided by the Supreme Court of the United States on June 27, 2024. The lower-court Records were not consulted. Because the decision is long, only the opening portions of some opinions were read. It addresses the decision's meaning within United States law and does not compare it with Korean law. The text of the decision was checked as of 2026-10-07.

This piece examines whether the Bankruptcy Code authorizes the nonconsensual discharge of the Sacklers under Purdue's reorganization plan. Working within the text of the decision, it contrasts the majority's contextual interpretation with the collective-action reasoning in the opening part of the dissent.

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Research pairCivilWith a synthetic case

It was agreed that the money had been sent in error. Can that agreement also block the bank's set-off?

Research material pairing the published Supreme Court Decision 2012Da72612 with a separate synthetic case set in the future. It distinguishes the actual facts and the court's determinations, current law as confirmed on October 1, 2026, the synthetic 2031 premises, and the editor's conditional interpretation. It does not predict future law or service performance, and the outcome of the actual case after reversal and remand has not been confirmed.

An actual decision in which a prior attachment was held to be a special circumstance, even though return of the mistaken remittance had been requested and the request accepted. In a 2031 synthetic payment Case, it separately reads the business partner code, the deposit agreement, future deposit claims, and the set-off notice.

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In-depth analysisCriminal

How did an appraisal that the handwriting was the same become a conclusion about whose handwriting it was? — Evidence structure of the retrial for the ghostwritten suicide note

This is a case-structure analysis based on two actual published decisions. It distinguishes the facts charged, the parties' assertions, the court's determinations, and the editor's interpretation. It separates the not guilty verdict on the aiding suicide count from the National Security Act violation count for which there were no grounds for retrial, and adds no deliberation or fact absent from the records. It analyzes the court's written descriptions; it is not an independent appraisal based on direct examination of the individual handwriting images and the omitted annexes. Current law was checked as of September 30, 2026.

A work log, notebook, and memo pad that an appraisal found matched the suicide note; the copy that was left first; and statements that changed after the comparison materials had been seen. Following Seoul High Court 2008Jaeno20 and Supreme Court Decision 2014Do2946, it examines in depth the premises of the appraisal, how the materials moved, and how proof was assessed in the retrial.

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Research pairRehabilitation & bankruptcyWith a synthetic case

The AI computing equipment stays in use. Must the loss-indemnity undertaking for the same equipment be performed as well?

A research pair combining the published Supreme Court Decision 2021Da301206, decided March 13, 2025, with a separate synthetic case set in the future. It distinguishes the actual decision, current law as confirmed on September 30, 2026, a newly created 2030 case, and the editor's competing interpretations. The future portion assumes that the currently confirmed framework of adjudication remains in place; it is not a prediction of AI capabilities or of the law in 2030.

An actual decision holding that, even after performance of the vessel use agreement had been elected, the disputed claim for indemnification of tax loss was not a common-benefit claim. Contrasting a synthetic 2030 computing-equipment contract and a performance-demonstration undertaking, it examines the difference between a technical connection and a legal relationship of exchange.

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In-depth analysisRehabilitation & bankruptcy

The auction proceeds had already been distributed. Once they are returned to the bankruptcy estate, against whom is the claim then brought?

A case-structure analysis limited to the published full text of the actual Supreme Court Decision 2024Da324972, decided April 9, 2026. The Court dismissed the appeal. The full text of the court below and of the preceding related lawsuit, individual Evidence originals, and any actual payment thereafter remain unverified. It distinguishes the assertions and determinations set out in the written decision from competing interpretations constructed by the editor. Statutes were checked as of 2026-09-30.

After the distribution schedule became final, the grant of security was avoided and the money was returned. Tracing the two shares, the two assignments of claims, and the six amounts in Supreme Court Decision 2024Da324972, it examines how the relative effect of the right of avoidance and the restoration of security after the return operate together.

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Research pairCriminalWith a synthetic case

An AI transformed company materials into a new checklist. Is that information stolen property?

Republic of Korea · a research pair combining a 2032 synthetic Case and the actual Supreme Court Decision 2002Do745. Company Q, A, and the operation and Records of the AI are fictional. It assumes that the analytical framework of the statutes and precedents, as confirmed on September 30, 2026, remains in place; it is not a prediction of future law. The simulated conclusion is limited to a theft charge brought with the information itself as the object of the theft; it does not decide other liabilities or who holds rights in AI outputs.

An AI summary restructured non-public materials for easier use. Distinguishing the assertion that the competitive value of the information was impaired from the property requirement of the offense of theft, it contrasts precedents concerning actual output with a future synthetic Case.

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In-depth analysisCivil

The 7/9 share was purchased for 4.2 billion won. Why was an old appraised value used for the remaining share?

An analysis of the case structure of an actual, officially published Supreme Court decision. The full text of the order and the reasons was read, together with Article 269 of the Civil Act as confirmed on September 30, 2026. The full text of the court below, the appraisal report, the contract, the registry, and other original records, as well as the outcome after remand, were not confirmed. The converted amounts in the table are hypothetical calculations made for editorial purposes, not confirmed damages amounts. The separately marked competing explanations and the assumptions about additional materials are scholarly interpretations.

In an action for partition of co-owned property, the price is not settled by a single figure in an appraisal report. Linking the timing of the sale, the trust, and the close of oral argument in Supreme Court Decision 2022Da244805, the entry examines why an actual sale of a partial share conflicted with an earlier valuation of the whole building.

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In-depth analysisRehabilitation & bankruptcy

The Debtor Offered to Pay Over the Younger Sibling's Surrender Value. Can a Retraction Justify Refusing Discharge?

This is a case analysis of an actual published decision. The facts and the court's reasoning are based on Supreme Court Decision 2024Ma6789 dated December 26, 2024. The questions comparing the materials and the hypotheses about additional evidence are PRO SE's editorial analysis. The outcome was that the lower court's decision refusing discharge was reversed and the case remanded; whether discharge became final after remand has not been confirmed.

A business registered in the debtor's name, insurance premiums paid by a younger sibling, and materials that were submitted but judged insufficient. Through Supreme Court Decision 2024Ma6789, this analysis examines the scope of the duty to explain, the attribution of family property, and the limits on weighing, in the discharge review, a retracted willingness to pay money into the bankruptcy estate.

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In-depth analysisCriminal

Asked Whether It Was Voice Phishing: Is the Question Evidence of Not Knowing?

This is a case analysis of an actual, publicly available judgment. It distinguishes the facts and legal principles set out by the Supreme Court, PRO SE's competing readings, and hypotheticals that assume additional material. The Supreme Court reversed the acquittal below and remanded the case; the final outcome after remand was not verified in this analysis. This analysis does not make a fresh determination of any person's guilt or innocence, nor does it provide legal advice on any individual case.

A person who started out delivering documents was given the task of collecting cash and continued the work even after asking whether it was voice phishing. Following Supreme Court Decision 2025Do486, this analysis examines how the existence of the question, the explanation given in response, and the subsequent conduct connect in the determination of intent.

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In-depth analysisRehabilitation & bankruptcy

The Wages Were Held by the Employer. Can Non-Payment Alone End an Individual Rehabilitation?

Republic of Korea · A case analysis reading the publicly available full text of Supreme Court Decision 2023Ma6207 dated September 19, 2023. It distinguishes the facts and reasoning of the actual decision, the editorial interpretation offered to explain them, and separately marked hypothetical cases. The relevant provisions were checked on September 30, 2026. This is not guidance on how any particular person should file an application or challenge a decision.

A plan to pay in attached wages after confirmation, and the employer's certificate that it was holding them. When a court infers future inability to perform from present non-payment, how should it account for the fact that its own decision changes whether the money can be used?

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Research pairCriminalWith a synthetic case

If the AI of a Person Who Has Left the Meeting Remains, Is That Person Still a Party to the Conversation?

Republic of Korea · hypothetical case set in 2032. This research pair is constructed on the premise that the provisions checked on September 30, 2026 and the legal principles of the cited precedents remain in place. A, B and C, the company, and the conversations and logs are all fictional and are not records of an actual case. The subject of research is whether a particular segment of a recording may be used as evidence in a criminal trial.

A recording made after a participant left the room, submitted in an embezzlement trial. This entry examines whether the mere fact that an AI tasked with relaying the schedule asked a question allows its owner to be regarded as a participant in all subsequent conversation.

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In-depth analysisCivil

There Were No Penalty Points for Lateness. But Arriving Late Meant Fewer Customers to Call

This piece analyses the reasons of an actual published judgment. The lower court's decision is discussed only to the extent reproduced in the Supreme Court judgment; the full text of the lower court's judgment and the non-public case records were not reviewed directly. The hypothetical evidence in the latter part is distinguished from the facts established in the actual case.

Supreme Court 2016Da29890, concerning whether card-loan telemarketers were workers. Rather than the labels of the rules, this piece examines how customer allocation, consultation guidelines and commission deductions operated together.

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In-depth analysisRehabilitation & bankruptcy

The Bank Debt Was Listed, but the Guarantor Was Left Out: A Case Analysis Distinguishing an Old Guarantee from Knowledge at the Time of Discharge

A case analysis of an actual case, based on publicly available judgments. The first-instance, appellate and Supreme Court judgments, together with the 2026 Supreme Court decision used for comparison, were examined directly. The original litigation record, such as the loan agreement, the letter of guarantee and the application for discharge, was not examined, and neither was the outcome after remand. The opposing readings and hypothetical evidence below are the author's analysis, not additional facts of the actual case. Article 566, shown as in force from October 2, 2026, was checked separately, but this is not an individual legal opinion based on a full survey of subsequent legislation and case law.

Supreme Court Judgment 2023Da266031 rendered on December 12, 2024. This analysis separates the 1998 loan, the 2009 application for discharge and the guarantor's 2021 payment. It then traces why the three instances read the same omission differently, and where the burden of proof lay.

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In-depth analysisCriminal

The Computer Was Returned, but Where Did the Information Remain? A Structural Analysis of a Case on the Search and Seizure of Electronic Information

An analysis of the actual case structure confined to the publicly available decision. The original investigation records, the original warrants and the forensic logs were not inspected. Factual statements are limited to what is stated in the decision, and the supplementary verification table sets out research questions rather than a list confirming that actual records exist. This piece analyses the reasoning of the 2015 decision. It is not a legal opinion reviewing subsequent case law and current law as a whole.

Supreme Court Order 2011Mo1839 dated July 16, 2015 (en banc). The analysis reconstructs the path the information took from the removal of the original storage media through imaging, re-copying and a warrant for a separate offence. It then reads the judgments that diverged over the same facts, which treated them as a whole procedure, as individual stages, or item of information by item of information.

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Research pairCivilWith a synthetic case

If an AI Noticed a Pricing Error, Did the Company Also Transact with Knowledge of It?

Republic of Korea · Hypothetical case set in 2032. This is a mock judgment for research purposes, constructed on the assumption that the legal principles of the precedents cited below remain in force; it is not an actual judgment. It is assumed that the formation of the contract and the arrival of the time for performance are not in dispute, and that there are no other grounds for nullity, rescission or termination.

Does an automated purchase record that suspected an error explain the company's knowledge and its exploitation of that error? Two actual precedents serve as anchors, while the attribution of the AI's judgment to the company is left as a research hypothesis.

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