Question

The truth table represents statements p, q, and r.

p q r
A T T T
B T T F
C T F T
D T F F
E F T T
F F T F
G F F T
H F F F
Which statements are true for rows A and E? Select two options.

p ↔ q
q ↔ p
q ↔ r
r ↔ p
r ↔ q

Answer 1

q ↔ r
r ↔ q

Reason: In rows A and E both q and r are true, so the biconditional q ↔ r (and its commuted form r ↔ q) is true in both rows. p differs in row E, so any biconditional involving p is false for at least one of the rows.