PHIL 1102 Lecture Notes - Lecture 1: Gregorian Calendar
Document Summary
There are no labs: we are only working with concepts in order to justify our claims and convince others. Logic has been studied since around 500 bc, or around the time academia came into existence for any purpose other than mythology. A statement is a declarative sentence, which can be either true or false. The truth value of a proposition is one of true or false. So long as a sentence is a proposition, then we assume that it must be either of these. June is the 6th month of the gregorian calendar - true. Mitt romney is the us president - false. The number of elementary particles in the universe is precisely 1. 35 1086. Either true or false, though we don"t have the means to tell which it is. So, the key element of a proposition is that it has one of these truth values, regardless of whether we are able to tell which truth value it has.
