Critical Thinking: Relevance Relevance-Related Logical Fallacies, and Sufficiency

IntroductionLast week we revisited premise acceptability and looked at rules of thumb for acceptance, rejection, or “questionable” status.   This week we’re going to continue our happy reinvestigation of foundational principles by reexamining premise relevance and sufficiency.  Recall from previous discussions that relevance and sufficiency are measures of logical force; that is, the degree to which a conclusion follows from premises.  In […]

Read More Critical Thinking: Relevance Relevance-Related Logical Fallacies, and Sufficiency

Critical Thinking: Premise and Evidence Acceptability, Unacceptability, and Uncertainty Revisited

IntroductionUp until now we’ve looked at the major components of argument, argument evaluation, and argument construction:  (a) premise acceptability and (b) logical force (which is made up of (i) premise relevance and (ii) sufficiency).  Now we are going to look at these elements a little more closely. Premise/Evidence AcceptabilityWhen it comes to value-based arguments (e.g., […]

Read More Critical Thinking: Premise and Evidence Acceptability, Unacceptability, and Uncertainty Revisited