Universal affirmative: Difference between revisions

no edit summary
No edit summary
Tags: Mobile edit Mobile web edit
No edit summary
Tags: Mobile edit Mobile web edit
Line 1: Line 1:
A [[universal affirmative]] is a categorical statement taking the form: “Every A is B.” where A and B are [[predicate|predicates]]. In the language of predicate logic, this can be expressed as: ∀x:A(x)⟹B(x).
{{g}}A [[universal affirmative]] is a categorical statement taking the form: “Every A is B.” where A and B are [[predicate|predicates]]. In the language of predicate logic, this can be expressed as: ∀x:A(x)⟹B(x).


[[Universal affirmative]]s can only be partially converted.  “All of Alma Cogan is dead, but only some of the class of dead people are Alma Cogan.”
[[Universal affirmative]]s can only be partially converted.  “All of Alma Cogan is dead, but only some of the class of dead people are Alma Cogan.”