I think you need to use "all available information" to help you determine whether the pitch was a ball or a strike.
So, if the pitch is right down the middle, or in the opposite batter's box, it doesn't matter what the catcher does -- his actions don't "outweigh" what you saw.
But, if the pitch is just on / just off the plate then the catcher's actions might help you decide what you saw.
(Let me add that some of this is level-dependent.)
Last edited by bob jenkins; Wed Mar 25, 2009 at 07:36am.
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