percentcer parent
on, off, and the other thing
True, False and file not found
hi-z is one choice. Though I don't know how well that does past a certain speed.
It works poorly at any speed. Hi-Z is an undriven signal, not a specific level, so voltage-driven logic like (C)MOS can't distinguish it from an input that's whatever that signal happens to be floating at. In current-driven logic like TTL or ECL, it's completely equivalent to a lack of current.
I wasn't pitching it as a solid commercial idea. Just that you can get (perhaps fiddly) three states out into the real world with something cheap that already exists. Like: https://idle-spark.blogspot.com/2015/04/low-cost-n-ary-dacs-...
Using 8 way quadrature and high-z, you have 16 values packed into 1 quasi-hexalogic gate. May your hydration prove fruitful.
On, off, and ooh shiny!
null :)