5. An expression is a tautology if it is always true, regardless the truth of its component statements. Thus, the last column in its truth table will be all T's. A statement is a contradiction if the last
column is always F-it is never true.
(a) Show that (p q)
--
p is a tautology by completing this truth table.
P.
pg
(p q) - P
9
T
T
T
T
T
F.
T
F
F
T