| E. Cobham Brewer 1810–1897. Dictionary of Phrase and Fable. 1898. |
| | | Propositions, | | |
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in logic, are of four kinds, called A, E, I, O. “A” is a universal affirmative, and “E” a universal negative; “I” a particular affirmative, and “O” a particular negative. | 1 |
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| “Asserit A, negat E, verum generaliter ambo! |
| Asserit I, negat O, sed particulariter ambo.” |
| A asserts and E denies some universal proposition; |
| I asserts and O denies, but with particular precision. | |
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