Computers also fail, it is normal that it is rarely and it tends to be because there is a bug in your program, in the end they only do what they are told...
What is true is that when they hang there are different ways to say it, with a code undecipherable, with a phrase that there is no who understand, or simply asking for apologies so at least not you get angry you with them who in the end are probably less guilt have
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