error of judgment

See: fault, mistake
References in classic literature ?
Certainly she had often, especially of late, thought his manners to herself unnecessarily gallant; but it had passed as his way, as a mere error of judgment, of knowledge, of taste, as one proof among others that he had not always lived in the best society, that with all the gentleness of his address, true elegance was sometimes wanting; but, till this very day, she had never, for an instant, suspected it to mean any thing but grateful respect to her as Harriet's friend.
To have yielded then would have been an error of principle; to have yielded now would have been an error of judgment.
As if a benevolent despot might not by any error of judgment destroy his kingdom, and then say, like Romeo when he got his friend killed,
His idea was that there's nothing really wrong with the physical organism of the insane, and that insanity is, so to say, a logical mistake, an error of judgment, an incorrect view of things.
He said: "I have already expressed my regret but I wish to go a step further and describe it as an error of judgment on my part.
The PM's failure to sack Ms Miller is an error of judgment BARONESS BOOTHROYD IN BOMBSHELL WARNING
The captain made a grave error of judgment, but he is only human - it's just a shame he didn't act on his error more quickly.
If, on the other hand, a physician's conduct does not violate the standard of care, then he or she has not, by definition, committed any culpable error of judgment.
Cook said: "My error of judgment in this matter has prompted me to reach this decision, which I believe is in the best interests of the football club.
He said: "Putting it right for the Prime Minister means starting by admitting the appalling error of judgment he made in hiring Andy Coulson.
It would appear that it was an error of judgment - assumptions were made about what other people were doing.
I abhor paedophilia and any sexual abuse of children and know that this was a gigantic error of judgment on my behalf.