PHIL 210 Study Guide - Quiz Guide: Deductive Reasoning, Natural Number, Modus Ponens

• School: Concordia University
• Department: Philosophy
• Course: PHIL 210
• Professor: Gregory Lavers

Document Summary

Chapter 1 the parts of public thinking deductive argument. Arguments that is invalid and not sound. P1, p2, and p3 are all true, the conclusion is true as well. But the premises do not relate to nor do they support the conclusion, therefore it is not valid, therefore not sound. The premises relate to and supports the conclusion in a way that is premises are true conclusion is true, therefore is it valid, all the premises are true: this argument is sound. This is also an example of an argument framed in categorical terms: manner of how the categories vixen, fox, and mammal are related. Conditional reasoning: ( if p then q ) Quantifier expression: ( like some and every ) the previous example. Variable: ( like x or y kind of place holder for objects that could be plugged into the statement: ex, 1. For every object x, if x is a vixen then x is a fox: 2.