PHI 1101 Lecture Notes - Lecture 9: Backpack, Soundness, Logical Reasoning

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

Document Summary

If it"s raining, you should bring your umbrella. 2: you should bring your umbrella (1,2) If you should bring your umbrella, then you shouldn"t have room for that extra book bag: you shouldn"t have room for that extra book bag. Intermediate conclusion: is a statement that is both a premise and a conclusion. If you take out one of the points it will still make sense. Complex arguments: an argument with at least one intermediate conclusion. Steps to analyzing arguments: put the argument in standard form, assess the premises (relies on step 1, assess the inference (relies on step 1, assess the argument (relies on steps 2-3) We want to know if its is valid or invalid. If it"s possible that the conclusion could be false even if the premises are true, then the inference is invalid. If the truth of the premises would guarantee the truth of the conclusion, the conclusion is valid.