Logic

Abstract

WORKS OF GALEN CONCERNING LOGIC (LOST UNLESS OTHERWISE INDICATED) Under the heading 'books useful for demonstrations' ( On My Own Books [ Lib.Prop. ] XIX 39): On demonstration , in fifteen books ( ibid . 41) On things necessary for demonstrations , in one book ( ibid . 43) On propositions with the same meaning , in one book On propositions missed out in the expression of demonstrations , in one book On proofs with 'because' , in one book / On the number of syllogisms , in one book On example , in two books On induction , in one book On simile , in one book On hypothetical principles , in one book On similarity , in three books On what we mean in natural language by 'genus' and 'species' and words allied to them , in one book On the possible , in one book ( ibid . 44) On things said in many ways , in three books On what's common and particular in the arts , in one book On arguments which refute themselves , in one book On possible propositions , in one book On syllogisms from mixed propositions , in one book How one should distinguish an enquiry into things from one into word and meaning , in one book

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