Question

Propositional Logic 2) Determine whether each of the following expressions is a propositional logic well-formed formula (PL WFF) that is tautological, contingent, or inconsistent. Write down “T” (for tautological PL WFF), or “IC” (for inconsistent PL WFF), or “C” (for contingent PL WFF). If the expression is not a PL WFF, do not write anything. a) ((P ? Q) v (Q ? P)) b) ((~P ? Q) & (R ? Q)) ? ((P ?R) ??Q) c) ((~P ? Q) ? ((R v ~P) ? (R v Q))) d) ((P ? Q) ? (~P ? Q)) e) ((P ? ~Q) & ~(Q ? R))

          Propositional Logic
2) Determine whether each of the following expressions is a
propositional logic well-formed formula (PL WFF) that is
tautological, contingent, or inconsistent. Write down “T” (for
tautological PL WFF), or “IC” (for inconsistent PL WFF), or “C”
(for contingent PL WFF). If the expression is not a PL WFF, do not
write anything. 
a) ((P ? Q) v (Q ? P))
                           
b) ((~P ? Q) & (R ? Q)) ? ((P ?R) ??Q)
     
c) ((~P ? Q) ? ((R v ~P) ? (R v Q)))
     
d) ((P ? Q) ? (~P ? Q))
             
       
e) ((P ? ~Q) & ~(Q ? R))

Added by Cody G.

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