Comment by skydhash

> computers have traditionally operated with an extremely low tolerance for errors in the input

That's because someone have gone out of their way to mark those inputs as errors because they make no sense. The CPU itself has no qualms doing 'A' + 10 because what it's actually sees is a request is 01000001 (65) as 00001010 (10) as the input for its 8 bit adder circuit. Which will output 01001011 (75) which will be displayed as 75 or 'k' or whatever depending on the code afterwards. But generally, the operation is nonsense, so someone will mark it as an error somewhere.

So errors are a way to let you know that what you're asking is nonsense according to the rules of the software. Like removing a file you do not own. Or accessing a web page that does not exists. But as you've said, we can now rely on more accurate heuristics to propose alternatives solution. But the issue is when the machine goes off and actually compute the wrong information.