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Now you just replaced one incalculable thing with a different incalculable thing.
Eh?
Computers don’t subtract, and you can’t just add a negative, a computer can’t interpret a negative number, it can only store a flag that the number is negative. You need to use a couple addition tricks to subtract to numbers to ensure that the computer only has to add. It’s addition all the way down.
What does this have to do with computers?