Deduction from single premise
From particular premise
- A <> B => There are B.
- B <> A => There are B.
- A |> B => There are B.
- B <| A => There are B.
To universal sentence
- There are no B. => A < B
- There are no B. => B > A
- There are no B. => A | B
- There are no B. => B | A
From universal premise
- A <. B => There are B.
- B .> A => There are B.
- A |. B => There are B.
- B .| A => There are B.
Such deductions from a single universal premise are not valid for
the "undotted" A
, A*
and E
relations.
See also (1, §13, p.72).
Bibliography
[1] Willard van Orman Quine. Methods of Logic. Second Edition Revised 1962, Reprinted (with corrections) 1966.