190 likes | 365 Views
Negation. “not” ~. T. F. Disjunction. “or” V Only False when both statements are false. Conjunction. “and” ^ Only true when both statements are true. C onditional. “If….,then” → Only false when true then false. Biconditional. “If and only if” ↔
E N D
“not” • ~ T F
“or” • V • Only False when both statements are false
“and” • ^ • Only true when both statements are true
“If….,then” • → • Only false when true then false
“If and only if” • ↔ • True when the truth value of both statements is the same.
Change Order and negate bothEx. p→qcontrapositve: ~q→~p ALWAYS LOGICALLY EQUIVALENT TO THE ORIGINAL