system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why is binary with transistors used in computers? Why not other states like 3 or 4?

I saw this in a video and they said that it was because if there are more states, there'd be "interference" from other devices?

What does it mean? Transistors make use of semiconductors and flow of electrons, why not divide certain voltages for more states?

I apologise if I got any info wrong, but please make me wrong. Layman terms would be appreciated.
gpt
Two states are easy. On and off. This is very easy for transistors to compare. You don't need to be careful about what exact voltage the transistors output - just on or off. Making a system that sets exact voltages and differentiates them would likely just end up being a bunch of different interwoven binary systems running at different voltages. Not really a step up.

Now, analog computers have been attempted, but they are less reliable and more difficult to make than digital ones, and ultimately digital was the one that humanity chose to use.