Exchanging subject and predicate can make new statements {converse, logic}|. For example, "No A is B" has converse "No B is A". "Some A is B" converts to "Some B is A". For categorical statements "No A is B" and "Some A is B", if statement is true, converse is true. All other categorical converse statements must have independent proof. Conversion {conversion per accidens} from "All A are B" to "Some B are A" is valid.
Mathematical Sciences>Logic>Statements>Permutations
3-Logic-Statements-Permutations
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Date Modified: 2022.0224