Never? That's a mighty big word Chris.
We all make mishtakes from tyme to tyme - even a "real sound person" may drop a frequency clanger or three.
In any case one of the foundations of my life has been that I'd rather make the mistake and learn from it than witness it and be no wiser. But maybe I'm not real, maybe for real.
And on that note - probably out of tune - I'm going to see if I can learn what is wrong with my new hard disc. It may be a slipped disc. Maybe I should have used a real to real.