A cake is a very good test of an oven: if it browns too much on one side and not on the other, it's not your fault - you need to have your oven checked. ↗
If you're like me, I get hooked into to-do lists, you know. I'll say I checked that off. Okay, I did that. And you have all these things you're doing. ↗
If any sort of error is inexcusable, it's an incorrect phone number. One of the cardinal rules of copy editing is that every phone number published must be checked. ↗