PHIL 105 Lecture Notes - Truth Table, Begging

• School: Simon Fraser University
• Department: Philosophy
• Course: PHIL 105
• Professor: Kirstie

Document Summary

Rules of argument evaluation: conjunction: p and q. A conjunction is true if and only if both conjuncts are true. It is false if either conjunct is false. F f f e. g. john is happy and mary is happy is false if: John is not happy and mary is not happy (neither john nor mary is happy: disjunction: p or q. A disjunction is true if and only if at least one conjunct is true. It is false if and only if both conjuncts are false. F f f e. g. john is happy or mary is happy is john is not happy and mary is not happy (neither john nor mary is happy) It is false only when both disjuncts are false. (table above) Sa fe to choose an example where both disjuncts are false. Either thor ate the steak or my flatmate ate it.