Construct a complete truth table for the following argument. Then, using the truth table, determine whether the argument is valid or invalid. If the argument is invalid, choose an option which presents a counterexample. (There may be other counterexamples as well.)
(O ≡ P) ∨ P / P ∨ ~O
(A)Valid (B)Invalid. Counterexample when O and P are true (C)Invalid. Counterexample when O is true and P is false (D)Invalid. Counterexample when P is true and O is false
A