I have this formula $(a\cdot b)+(\neg a\cdot \neg b)$ At first I thought this kind of $a+\neg a = 1$ so the answer is 1, but then I realized $(\neg a\cdot \neg b) \neq \neg (a\cdot b)$.
I try to do De Morgan for each $(a\cdot b)$ and $(\neg a\cdot \neg b)$ so it will be $(\neg a+\neg b) + (a + b)$
am I doing it wrong?
(I'm sorry for my bad English)
Best Regards