PHIL 120 Lecture Notes - Lecture 3: Syllogism, Deductive Reasoning
Document Summary
Week 3: phil 120 / chapter 9 section 1,2,3 (and, not, xor, if: simple and complex propositions. A form of sentence can be presented in other similar forms (example pg 203) Complex propositions: combine simple propositions with connectives. Negations: a proposition that denies another proposition. Possible form of negations: original case is g". Negations are as follow: ~g / g is not the case / not g. Other forms of words that represent negation: no, never, can"t, nothing, nowhere, un- Double negations: can be equivalently presented as x = ~~x or x = not not x. Double negations act to make the sentence positive. Exclusive disjunctions: when statements of both x and y can"t be both true which means, you can have either one but not both. *i think this is represented by xor whereas it the option eitheror is made explicit and you can"t have both.
