PHI 1101 Lecture Notes - Lecture 2: False Premise, Law Of Excluded Middle, Principle Of Bivalence

• School: University of Ottawa
• Department: Philosophy
• Course: PHI 1101
• Professor: Laura Byrne

Document Summary

Arguments: logically strong (inductively strong, deductively valid) --------- logically weak (inductively weak, deductively invalid) Each gets more complex and builds on the one before. Definition: a statement is a sentence used to make a claim. Statements are capable of being either true or false. A lot of what humans say are sentences. This property of being either true or false distinguishes statements from sentences which are not capable of being either true or false: commands, questions and expressions of volition (wishes). Commands can not be argued as being false. Propositions socrates is a man (made a claim so it"s a statement) Expression of violation oh, that socrates were a man. This law states that it is impossible for both a proposition and its negation to be true at the same time. Ex: you passed and you failed the test a does not make sense, isn"t true.