Answer throw a to b about the equivalent :
a ) determine whether p ? (q ? r) and p ? (q ? r) are equivalent.
b) prove that the proposition “if it is not hot, then it is hot” is e quivalent to “it is hot”.
c) determine whether the following two propositions are logically equivalent:
p ? ((not)q ? r) and (not)p ? (not)(r ? q)