Yeah I mean I guess you're right - the verbiage could be improved. I just don't think it's worth getting hung up on. It's still a fun little game. I've heard that everything in a processor can be built up out of nand gates and always wondered how that worked so it's been neat to work through it.
It's kind of a learning-first game though so I guess if your goal is to beat the game and get every achievement, yeah you'll be disappointed.
You can create equivalents of AND, OR and NOT with only NAND, which is why it's possible for everything in a processor to be NAND gates only.
https://en.wikipedia.org/wiki/NAND_logic
It's kind of a learning-first game though so I guess if your goal is to beat the game and get every achievement, yeah you'll be disappointed.