Prove: ~(F&1L)
(s1) ~(T&U)
(f2) (~S v ~T) -> (~F v ~T)
~(~ST~F)V(~UF~T) by defn of conditional
(STFU)
(STFU) = (U)+(F&1L)
(s1) ~(T&U)
(f2) (~S v ~T) -> (~F v ~T)
~(~ST~F)V(~UF~T) by defn of conditional
(STFU)
(STFU) = (U)+(F&1L)


