He said I am allowed to use as many gates as i want, but only two can invert signals. So an inverter is a; not, nand, nor type gate. Also a xor gate can be built using a single nand so it is included as a inverter.
I was having a casual chat with one of my professors and he presented me with a problem that after 4 hours of attempting I believe is unsolvable. The set up is pretty simple.
You have 3 inputs x,y,z that go into a system, the output is ~x,~y,~z. However you are only allowed to use 2 inverters...