| 单词 | conversion per accidens |
| 释义 | > as lemmasconversion per accidens Conversion in which the quantity of the proposition is unchanged is called simple conversion (e.g. ‘No A is B’; ‘No B is A’); when there is a change of quantity, conversion per accidens (e.g. ‘All A is B’; ‘Some B is A’). Cf. contraposition n. 2.extracted from conversionn.conversion per accidens 2. Logic. Of a conversion: by which the quantity of the proposition is changed from universal to particular. Frequently in conversion per accidens (also called conversion by limitation), opposed to simple conversion at conversion n. 4. ΘΚΠ the mind > mental capacity > philosophy > logic > logical proposition > conversion of a proposition > [noun] > types of contraposition1551 conversion per accidens1599 infinitation1652 transversion1890 1599 T. Blundeville Art of Logike iii. 69 They say that the disiunct..may be conuerted both simplie and per accidens. 1677 T. Good Brief Eng. Tract Logick 27 Conversion per Accidens is a change of the Subject into the place of the Predicate, et contra, keeping the same Quality, but changing of Quantity. 1788 H. H. Kames Sketches Hist. Man III. 354 When the quantity is diminished, as in the universal affirmative, it is called conversion per accidens. 1840 R. Whately Elem. Logic (ed. 7) 77 This might be fairly named conversion by limitation; but is commonly called ‘Conversion per accidens’. 1864 F. C. Bowen Treat. Logic 158 The Judgment O remains, and this cannot be converted either simply or per accidens. 1916 H. W. B. Joseph Introd. to Logic x. 211 A proposition is said to be converted by limitation, or per accidens, when, it being universal, its converse is particular. 1999 J. Van Cleve Probl. from Kant xii. 202 The classical inference of conversion per accidens (i.e., from ‘all F is G’ to ‘some G is F’) is valid only if A-propositions are accorded existential import. < as lemmas |
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