[ImSorryButWho]

That's entirely the point. A NOR gate is functionally complete: you can build any logic gate out of just NOR gates.

[Aardwolf]

Probably because it's easier to have to know only one rule.

But... they got a character named "nory", having another character named "andy" could be fitting!

[anselmschueler]

You can, but then I don’t see the point of making it a colouring book.