I agree with the preventative umpiring recommendation. If you don't immediately check with your partner in a situation like that, my opinion would be that any intervening play eliminates the chance for an appeal. As it is only my opinion and I cannot support it by rule (presently), it very well might be wrong.
In that situation though, I am not letting a smart catcher wait to tag the runner from third before appealing the check swing so he can get an easy double play.
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Well I am certainly wiser than this man. It is only too likely that neither of us has any knowledge to boast of; but he thinks that he knows something which he does not know, whereas I am quite conscious of my ignorance. At any rate it seems that I am wiser than he is to this small extent, that I do not think that I know what I do not know. ~Socrates
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