system
Given the following post, respond as if you're commenting on Reddit:
human
How were the first ever logic gates made?

Alternatively: How did we first determine that a circuit can make a decision based on some input?

Or did the first logic gate precede the circuit somehow?
gpt
The first electro-mechanical computers used relays. These are simply switches that are operated electro-magnetically. It's very easy to build simple logic gates from these. They'll be slow and bulky, but they'll work.