PHL 101 Lecture Notes - Lecture 4: Logical Possibility, Possible World
Document Summary
Intro to philosophy possibility, analyticity, and consistency logical impossibility. Some things can be shown to be impossible by appealing to nothing more than logic and the meaning of terms these things are logically impossible. Ex: god both exists and doesn"t exist, for nothing can both exist and not exist logically impossible means the statement is contrary or inconsistent. Some all not are all logical words because they appear in the valid argument forms of formal logic. By considering the meaning or definition of key terms within the statement necessity and analyticity. Statements that are logically impossible can be shown to be false by appealing to othing more than logic and the meaning of terms. Same applies to statement that are true. These statements describe something logically necessary- analytical statements. Ex: logically necessary that either god exists or god doesn"t exist. The denial of any logically impossible statement is logically necessary statement and vice versa.
