Nand stopped working (output always 1)

[funkyvodka]

--solved--

[ybakos]

Sounds like you borked your Not implementation. Start there, make sure it passes.

[funkyvodka]

Thanks, I found a typo. It should've been obvious, but I missed it at first.

[ybakos]

Dude I make that kind of mistake all the time. Keeps us humble.