PHI 1101 Lecture Notes - Lecture 8: Soundness, Backpack, Logical Reasoning

• School: University of Ottawa
• Department: Philosophy
• Course: PHI 1101
• Professor: Christopher Mc Grath

Document Summary

The basic structure of logic: argument - a set of statements where on (conclusion) is supported by others (premises, a good argument is sound (cogent) Complex arguments: complex arguments - an argument with at least one intermediate conclusion. Intermediate conclusion - a statement that is both a premise and a conclusion. If its raining, you should bring an umbrella: you should bring your umbrella . (1,2, you should have room for that extra book bag. (3,4) If you should bring your umbrella, then you shouldn"t have room for that extra book bag. Independent premise - premises that support the conclusion independently of the truth of any other premises (v diagram: dependent premise - premises that support the conclusion only in conjunction with other premises (t diagram) Analysing arguments: put the argument in standard form, assess the premises (relies on step 1) Identify the premise (you can get this from the standard form)