PHIL 1010 Lecture 3: Logic and Critical Reasoning

• School: University of Guelph
• Department: Philosophy
• Course: PHIL 1010
• Professor: Karyn Freedman

Document Summary

Phil 1010 - lecture 3 - logic and critical reasoning. An argument consists of a set of sentences consisting of one or more premises, which contain the evidence, and a conclusion, which is supposed to follow from the premises. If money grows on trees, then donald trump is the prime minister of canada. Thus, donald trump is the prime minister of canada. An argument is deductively valid so long as the argument is such that the conclusion must be true if the premises are true. An invalid argument, by contrast, is one in which it is possible for the premises all to be true but the conclusion is false. A sound argument is an argument which is valid and whose premises are all true. If the argument is valid and the premises are then the conclusion must be true.