Define INTENTIONALLY DROPPING THE BALL IS?

Question
"Here is my question: can you please define intentionally dropping theball?...let me expand, further, if there is a runner on first, or runneron first and second, and a soft fly ball is hit and the infielder,ss,2b,3b,or 1b, let the ball drop without hitting the glove and there isno infield-fly rule called, can he, legally, make the double play?.or itwould be illegal for him to make the double play since, "He" let theball dropped "intentionally" to the ground?.. please expand on your answer...and define intentionally dropping the ball..." Since the rule on MLB.com, does not define what "INTENTIONALLY DROPPING THE BALL IS"? can you please, once again elaborate on this question, forsomeone who does not follow baseball that much? I would really appreciate it, if you can explain this play in details,taking into account that the infield-fly rule IS NOT in effect. Many thanks.

Answer
Hi Winston,

I would think it was obvious but I know there is lots of confusion...

If an umpire judges that an infielder is capable of making a catch "without extraordinary effort" and then does not make said catch, this would be a deliberate drop.   That's why the infield fly rule was established - to avoid having the infielder deliberately drop the ball then make a double play out of what should have been a pop fly.

Remember, its a umpire judgement call.

Here's a good site to check out:
http://www.qcbaseball.com/baseball_rules/infield_fly_rule1.aspx

JohnMc