I was simplifying the expression:
(K.(K.(J+L))')+(K'.(K.(J+L)))
=(K.(K'+(J+L)'))+(K.K'.(J+L))
=(1+K.(J+L)')+(J+L)
=(1+K.(J'.L'))+(J+L)
=1+K.J'.L'+J+L
However, when I was evaluating this Simplified expression using the truth table, the result did not come as expected.
For J=K=L=1, the result is:
1+(1)(0)(0)+1+1=1
While the result is supposed to be 0.
Anything's wrong with my calculations?