PHIL 210 Lecture Notes - Lecture 8: Logical Truth, Truth Table, Atomic Sentence
21 Feb 2018
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Chapter 3 from p. 83 to chapter 4, end of section 4. 2 p. 109. Note : double negation is taken as equivalent to affirmation, which is not the case in. I do not not promise to go to the party" isn"t the same as saying that. " i do promise to go to the party" in english we want to look at the behaviour of the truth-functional connectives in transmitting truth-values. But the other way around does not hold logical truths are not necessarily tautologies i. e. sentences whose logical truth is beyond the truth-table method to detect. P is tautology just in case it receives t in every line of its truth-table e. g. p or not p is a tautology every tautology is a logical truth. Phil210 page 2 therefore, the truth table will construct a second row in which it allows that.
