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Unformatted text preview: sufficient
for
the
program
to
be
correct
 and
the
printer
to
be
working.
 
 2. Use
the
precedence
rules
to
give
the
fully
parenthesised
logical
expression
that
is
equivalent
to
 the
following
logical
expression:
 A
⇒
B
⇔
A
∨
¬
C
∧
B
⇒D
∧
E.
 
 3. For
the
following
expression,
determine
whether
it
is
a
tautology,
a
contradiction
or
a
 contingent
by
giving
its
truth
table
 (P
⇒
Q)
∨
¬(Q
⇒
P).


 4. Prove
that

 (A⇒...
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