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1. Construct categorical derivations for the following tautologies.
a) (P > Q) > ((P> ~Q) > ~P)
b) (P = ~Q)= ~(P = Q)
c) ( P >(P & Q))v( Q > (P&Q))
2. Construct derivations for the following valid arguments.
a) A>~B
~C> B
~A > ~C
A = C
b)
(P&G)>D
(R&S)>T
P & S
G v R
D v T
c) F > (~G > ~F)~(H > G) (~H & W)
A > (S & M)
~( A v F)
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