A counterexample to an argument form is a substitution instance whose
A) premises and conclusion are well-known truths.
B) premises are well-known falsehoods.
C) premises are well-known truths and conclusion a well-known falsehood.
D) conclusion is a well-known falsehood.

Question

Quizplus · Accepted Answer

A counterexample to an argument form demonstrates that the form is invalid by showing that it is possible for the premises to be true while the conclusion is false.

A Counterexample to an Argument Form Is a Substitution Instance