> (A) Modern computers run on electricity [not ones and zeroes]
> (B) one could build a computer out almost anything that lends itself to both being on and off
You got it right in B, which is exactly the point when people say computers are just 1s and 0s. Computers are a mathematical concept, not just some electrical device, as you seem to claim in A. The fact that you can build a computer out of water or air pressure or Minecraft Redstone is exactly the point people are making when they say they're built up from 1s and 0s (not electricity, not silicon and copper, not Redstone).
