True or false: what conversion allows
Read exercise and reference answers
- Questions
- Statement is true
- Yes
- Statement
- 'Some S is P' converts to 'Some P is S'.
- Statement is true
- No
- Statement
- 'Some S is not P' converts to 'Some P is not S'.
- Statement is true
- No
- Statement
- From 'Some men are not cooks' you may infer 'Some cooks are not men'.
- Statement is true
- Yes
- Statement
- O cannot be truly converted.
- Statement is true
- Yes
- Statement
- 'No S is P' converts to 'No P is S'.
The book is explicit that O cannot be truly converted: from 'Some men are not cooks' you cannot infer 'Some cooks are not men'. Source: Logic: Deductive and Inductive, Carveth Read (1898), public domain.