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Conjunction/Aristotle: Problem: white and man can be composed to white man. - That's fine - but: not "good" and "cobbler" - compound noun: cannot occur as the subject of a predication: E.g. lawyer-politician: then neither: "Every S is a scoundrel" nor "Some S are honest" as conjunction of predications, by first inserting "lawyer" and then "politician". - But this does not show that a conjunction is not a sentence. - False: "God and Plato are two wise men". - Solution: You do not have to decide whether none or "not all ..." occur in a class. - Conjunction: is not a pair of sentences! E.g. "Smith hears that Browns wife is unfaithful." - Negation of the conjunction: ~(p u q) = (plq), not both.
Conjunction/Sentence/Frege: "p u q" is a sentence that is different from "p" and "q" alone - Mill: ditto: otherwise "a group of horses" as "a kind of horse" - but not: E.g. "Jim is convinced and his wife is unfaithful "- Solution: "the fact that..." is always to be split as a pair of statements.
Logic Matters Oxford 1972