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a derivation in which the last step is the desired conclusion
Proof
a sequence of justified steps
Derivation
a premise, or a step that follows from previous steps according to one of the given rules of inference
Justified Step

Simp

Conj

Add

DS

MP

MT

HS

CD

DM

Assoc

Dist

Com

DN

Cont

Impl

Equiv

Exp

Taut