Читать книгу Selected Mathematical Works: Symbolic Logic + The Game of Logic + Feeding the Mind: by Charles Lutwidge Dodgson, alias Lewis Carroll - Lewis Carroll - Страница 28
(7)
Оглавление“Happy is the man who does not know what ‘toothache’ means!”
(1) The Subject is evidently “the man &c.” (Note that in this sentence, the Predicate comes first.) At first sight, the Subject seems to be an ‘Individual’; but on further consideration, we see that the article “the” does not imply that there is only one such man. Hence the phrase “the man who” is equivalent to “all men who”.
(2) The Verb is “are.”
(3) The Predicate is “happy *.”
(4) Let Univ. be “men.”
(5) The Sign of Quantity is “all.”
(6) The Proposition now becomes
“All | men who do not know what ‘toothache’ means | are | happy men.”
