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''Geneivat da'at'' or ''g'neivat daat'' or ''genebath da'ath'' ((ヘブライ語:גניבת דעת), "theft of the mind", from גנבה "stealing" of דעת "understanding") is a concept in Jewish law and ethics that refers to a kind of dishonest misrepresentation or deception. It is applied in a wide spectrum of interpersonal situations, especially in business transactions.〔 The origin of the term is attributed to the Talmudic sage Samuel of Nehardea in Talmud ''Chullin'' (94a): "It is forbidden to mislead people, even a non-Jew." Indeed, one Midrash states that ''geneivat da'at'' is the worst type of theft. ''Geneivat da'at'' is the worst because it directly harms the person, not merely their money.〔אנציקלופדיה תלמודית ''Encyclopedia Talmudit'' 6:225-231. On the ranking of theft, see Mekhilta ''Mishpatim'' 13, Tosefta BK 7, Hilchot De'ot 2:6. On the exception for honoring a person, such as a guest, see Hullin 94b and Tur HM 228.〕〔Resnicoff, Steven H. "Ends and means in Jewish law" JLA v.15, 2004, p.151, states that geneivat da'at is more "blameworthy... because the injury to the person is more personal and direct; it is not merely a financial injury...."〕 In rabbinic exegesis, the law is associated with Gen. 31:26 and II Samuel 15:6. False impressions are permissible in certain circumstances, for example, in order to honor someone. For instance, one generally should not invite a guest to take from an anointing oil, while knowing that the oil container is empty. Yet, one may offer the empty oil container so as to honor the guest and publicly display one's regard for the guest. By the same token, one may offer fine oil in order to honor a guest, even if the guest is likely to refuse the oil anyway.〔 ''Geneivat da'at'' is transgressed with a statement that is technically accurate but intended to leave a false impression. While such deception often involves commercial transactions, according to rabbinic law, deception is prohibited even if there is no monetary loss at stake.〔Rabbi Shlomo Ganzfried, ''Kitzur Shulchan Aruch'', 63:4.〕 Thus, the rule applies both to business sales as well as gift-giving. A simple example of ''geneivat da'at'' would be to invite someone to dinner, merely to appear hospitable, knowing full well that the recipient would decline due to a prior commitment (a case discussed in the Talmud, ''Chullin'' 94a). The concept is incorporated in three provisions of Meir Tamari's proposed "Halakhic Corporate Code of Ethics" -- insider trading (even where permitted by secular law), product information and advertising, and fraudulent financial accounting reports.〔(A Halakhic Corporate Code of Ethics ), by Tamari and Mark Schwartz.〕 ==Contemporary applications== Writers on Jewish ethics have applied ''geneivat da'at'' to a variety of contemporary ethical dilemmas. In Jewish business ethics, the prohibition against leaving a false impression is commonly applied to advertising and sales techniques. '' Geneivat da'at'' enables ethicists to analyze improper selling techniques, such as employing a pretext to enter a home in order to make a door-to-door sales pitch.〔Levine, Aaron. ''Case Studies in Jewish Business Ethics'' 2000, p. 91〕 Claims to sell at a discount may run foul of ''geneivat da'at'', when the catalog is deceptive. Specifically, if there is no suggested retail price, the catalog should not claim to offer a discount based on the seller's own estimated "standard" price.〔 Rabbi Dr. Asher Meir, Business Ethics Center of Jerusalem ("Discounted from what?" )〕 Likewise, discounts based on misleading pretexts, such as a closing down sale when the store does not close, also transgresses ''geneivat da'at''.〔"Marketing and Morality - Breaking the Barrier" (Jewish Association of Business Ethics ) Retrieved 2-21-08.〕 Furthermore, the principle has been used to caution against overdone packaging, which leaves the impression of a larger product.〔Tamari, Meir. ''Al Chet: Sins in the Marketplace'', 1996 Rowman & Littlefield ISBN 1-56821-906-7 pp.73ff.〕 Similarly, advertising a luxury item as if it were a necessity, and any claims or even wrapping paper that leaves a false impression could cross the line set by ''geneivat da'at'' rules.〔"Advertising" (Jewish Association of Business Ethics ) Retrieved 2-21-08.〕 Through this principle, Jewish law has been applied to evaluate secular regulations of advertising. For instance, Levine argues that it is impermissible to advertise a promise not to be undersold, without comparable details of its policy to match prices. He notes approvingly that the Federal Trade Commission took action against an analogous deceptive advertising in a case against Thompson Medical Company, regarding misleading ads for a product that did not contain any aspirin.〔Levine 2000, p.198.〕 Insider treatment and misleading shareholder information would also be governed by this principle. In addition, ''geneivat da'at'' has been applied to other forms of misrepresentation in contemporary life. For instance, Reform rabbis have argued that the transfer of assets to children, so as to feign poverty and shield assets from a nursing home, is prohibited by this principle.〔Mark Warshofsky p.308 ''Jewish Living: A Guide to Contemporary Reform Practice'' 2000 Union for Reform Judaism, ISBN 0-8074-0702-X. He's referring (per p466) to Walter Jacob, ''Question and Reform Jewish Answers'', #91〕 Cheating can also be forbidden under the ''geneivat da'at'' principle. For instance, Rabbi Moshe Feinstein wrote, drawing partly on this principle, that yeshivas must not allow students to cheat on the annual Regents examinations and their school should not misrepresent grades. Nor should the yeshiva cheat on government subsidies by misrepresentions, such as inflating the number of its students.〔Feinstein, Moshe. ''Igrot Moshe'' HM 2:29-30.〕 Proper citations are also at stake. An author or speaker who fails to attribute secondary sources may also violate geneivat da'at. Granted, if the audience does not expect explicit attributions, while it realizes that the speaker relies on secondary sources, then there would be no false impression. Nonetheless, the speaker should not rely on their own intuition about audience expectations, but rather consider only "a small, yet significant statistical probability" (''mi'ut ha-matzui''). How small? According to Levine, the audience expectation is quantified under halakhah. On the one hand, a speaker would not be required to cite sources merely to disabuse someone's rare, naive expectation that sources are cited. On the other hand, if 10 or 15 percent of the audience do indeed expect attribution, then a failure to identify one's secondary sources would be a violation of ''geneivat da-at''.〔Levine, Aaron. "Using Secondary Sources Without Attribution" in ''Moral Issues of the Marketplace in Jewish Law'', Yashar Books, 2005. ISBN 1-933143-09-6, pp. 31-35〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Geneivat da'at」の詳細全文を読む スポンサード リンク
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