MODR 1770 Study Guide - Final Guide: Conditional Sentence, False Dilemma, Law Of Excluded Middle

• School: York University
• Department: Modes Of Reasoning
• Course: MODR 1770
• Professor: Chandra Kumar

Document Summary

Remember, in the course outline, i mentioned that critical reasoning requires, among other things, some basic logic skills. With that in mind, we are now going to have a brief logic interlude. Here are the headings for this lecture (no readings required). 2 laws of logic (law of non-contradiction, law of excluded middle) I hinted at in discussing deductive" arguments in lecture 5) is this: pure logic is not about truth, it"s about the relations of deductive inference between propositions. A little side note on the word proposition": ( proposition" is the fancy word logicians use to mean, roughly, statement" . Because many different statements" or sentences" can actually mean the same thing, logicians use proposition" to capture the meaning of all the different. So the statement it is raining" actually says the same thing as the statement it is false to say it is not raining".