Sarcasm Detection Formula

OK, It kills me that I even feel the need to post this, but we all know it is long overdue.  I call it my Sarcasm Detection Formula (SDF for short).  It's quite simple and should only be used by those that can't detect sarcasm using their own inherent intelligence.  Here goes.

If:  The statement comes from intelligent, insightful person who has shown knowledge of the subject in question in the past.    AND   The statement would be instantly refuted by 90% or more of all intelligent people.  THEN IT'S SARCASM.

Like I said, simple.  If you can't tell on your own, just use the formula and it will probably save you some embarassment.