Brain Left Town

Why is it we don’t see our own writing errors as easily as we pick up on mistakes in the others’ writings? I mean silly, stupid stuff. Obvious mistakes! I am working on a novel of suspense, and the other day was reading a part with my critique group, and I didn’t even hear, much less catch, my goof. Thank heaven for critique groups! Here is what I wrote. “Guilty—by reason of insanity.” Duh!  A member of the group asked me if I meant not guilty. Oh, heck yes!  It should have been, “Not guilty—by reason of insanity.” What a jackass! I suppose my brain decided to take a stroll. Maybe it even left town.