If input A is 0 then A' will be 1, and if A is 1 then NOT A will be 0 - they cannot both be 1!
B
A
X.Z + X.Y + W.Z; alternatively: X.(Z + Y) + W.Z
A + B
A.B'
A.B
A.B' + A'.B (A XOR B)
A.B (A AND B)
A.B' + C
A'.B + A.B' (A XOR B)
A.C'
A + B (A OR B)
A