PHIL 24320 Lecture Notes - Lecture 3: Validity
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Andrea (in the class) is in london; therefore, the professor (of the class) is in london. If not, say why not; if so, provide an example. If not, say why not; if so, provide an example: yes (for both). It can be, only if the conclusion is a necessary truth. *necessary truth = truth no matter the circumstances; true in every possible situation a. i: logical validity can be a non-sequitur, because logical validity rules out the possibility of all true premises and false conclusions, logically valid examples: c. i. London is in england and 2 does not = 2, therefore, 2 =2. c. i. 1. There is no possible circumstance that the premises are true. Therefore, there is no possible circumstance that the conclusion is true. It is logically valid if it could never happen that all the premises are true but the conclusion"s not. c. i. 2. c. i. 2. a.
