Question on Logic circuit and Karnaugh Map
B   !B    C   B??C
---  ---  ---  ----
 0    1    0    1
 0    1    1    1
 1    0    0    0
 1    0    1    1
 0    1    0    1
 0    1    1    1
 1    0    0    0
 1    0    1    1


Do you see it now?