Which is/are a valid form(s)of valid deduction?
A) modus acumens
B) modus ponens and modus tollens
C) affirmation of the consequent
D) affirmation of the consequent and denial of the antecedent

Question

Quizplus · Accepted Answer

Modus ponens and modus tollens are both valid forms of deduction. Modus ponens states that if "A implies B" and "A is true", then "B must be true". Modus tollens, on the other hand, states that if "A implies B" and "B is false", then "A must be false". Affirmation of the consequent and denial of the antecedent are both invalid forms of deduction.

Which Is/are a Valid Form(s)of Valid Deduction