SOMEBODY ELSE'S PROBLEM

An SEP is something we can't see or don't see, or our brain does not let us see, because we think it's somebody else's problem.

That is what SEP means, the brain just edits it out, it's like a blind spot. If you look at it directly, you won't see it unless you know precisely what it is.

Your only hope is to catch it by surprise out of the corner of your eye.