The difference between working with kids and without is that if you don't have kids, and you didn't sleep, it's probably your fault. If you do have kids, you might have woken up at 5 am and just... not had the chance to deal with that fact.
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@silverwizard My 2 year old is a human alarm clock. 5am every dang morning.
My 3 year old is anywhere from 7 to 10 am, but my *1* year old is like "Could be 5? Could be 6? Could be 7? Don't know!"