Cassandra 📍 San Francisco (for real!)Someone then has a brilliant idea that will never, ever go wrong. Make your machine take instructions only as sounds that no human can make.
Except.
That doesn't work because all those wires connecting telephones only really work for the kinds of noises humans tend to make, you never needed them to do anything else!
So fine. You make your machine take instructions only after someone sends an *extremely pure* tone, the kind no one could make with their mouths.
Except.
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