PHL 110 Study Guide - Final Guide: National Order Of Quebec, Syllogism, Logical Biconditional
1 Feb 2015
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Contents: introduction to derivations, direct derivation (dd, conditional derivation (cd, indirect derivation (id, negation rules, strategies and rules of thumb, what to do when stuck: desperate measures , review problems. They can tell us almost anything we"d wish to know about a statement or argument in propositional logic. 1. they grow in size exponentially. (six atomics means 64 rows. ) 2. they"re alien to the way we ordinarily think. Our new unit focuses on a new way of establishing the validity of an argument without these flaws. This is an obviously valid form close to how we in fact reason. This argument is not, strictly speaking, of the same form as the one above, and it is not quite as obviously valid. It is valid, nevertheless, and we can prove that by showing how the conclusion follows from a chain of smaller arguments similar to our first example. What we have done is broken up this argument into a number of smaller arguments.
