Let's have a thread about strike zones!

[bob jenkins]

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.)