Being negative is negative [unless you are a politician and then it’s positive]. Therefore engaging in sour grapes is bad, right because you’re fault finding and nit picking? Wrong, if you’re doing it to feel better about something you wanted and didn’t get and you’re the type of person who typically blames yourself for negative outcomes. The sour grapes strategy can keep you from beating up on yourself until acceptance or arrives.

P.S. For 1,000,000 extra credit points, guess what I’m referring to.