A statement form that has only true substitution instances is called ……………………
A)a " tautologous statement form " or a " tautology"
B)a self-contradictory statement form or contradiction
C)A contingent statement form
D)specific statement form

Question

Quizplus · Accepted Answer

A tautologous statement form, or a tautology, is defined as a statement form that is always true, regardless of the truth values of the individual statements that make it up. This means that all of its substitution instances are true.

A Statement Form That Has Only True Substitution Instances Is