SSH 100 Lecture Notes - Lecture 3: Inductive Reasoning, Deductive Reasoning, Modus Ponens

• School: Ryerson University
• Department: Social Sciences and Humanities
• Course: SSH 100
• Professor: David Stamos

Document Summary

Deductive: an argument intended to provide logically conclusive support for its conclusion. A deductive argument that succeeds in providing such decisive logical support is said to be valid. If it fails to provide decisive logical support is said to be invalid. Deductively valid: if premises are true, its conclusion must be true too: all dogs have fleas bowser is a dog so bowser has fleas. Deductively invalid: conclusion does not follow logically from the premises. Sound argument: a deductively valid argument that has true premises is said to be sound. It is a good argument that gives you good reasons for accepting its conclusion. Invalid argument: a deductive argument that fails to provide conclusive support for its conclusion. Valid argument: a deductive argument that succeeds in providing conclusive support for its conclusion. Truth preserving: a characteristic of a valid deductive argument in which the logical structure guarantees the truth of the conclusion if the premises are true.