I don't know if this would be the right forum to post this at, but it seems this place is full of all kinds of smart. If anyone's familiar with Project Lead the Way it might help more also. There's a problem in it (2.2.5) that uses four sensors on a fire place and three out of four must have a 1. If not, it signals a zero.
Here is the Karnaugh Map I created below.
From that I think my logic is, BCD+ACD+DAB+CAB
If someone could check my work I'd appreciate it. Thanks, Jarod.
Edit: I should have scaled down that picture, it's HUGE lol