CAS PH 160 Lecture Notes - Lecture 3: Soundness, U.S. Bancorp, Co-Premise
Document Summary
Deductive argument: intended to provide logically conclusive support for its conclusion. Valid: succeeds in providing such decisive logical support if premises are true, there is no way that the conclusion can be false (truth-preserving); cannot have true premise, false conclusion; valid structure. Sound: deductively valid argument w/true premises content. Inductive argument: intended to provide probable not conclusive support for its conclusion. If premise is right, conclusion is probably true. Strong: succeeds in providing probable but not conclusive logical support for its conclusion. false; cogent: when inductively strong arguments have true premises. May be an inductively strong argument but may not be a good one if premises are. Premises are sometimes left unstated these implicit premises, or assumptions, are essential to the argument. Many arguments do have unstated premises that are not only necessary to the chain of reasoning but also must be made explicit to fully evaluate the argument.
