premature claim swiftly withdrawn
Declarer tables his hand saying "The rest are mine - oh hang on, clubs might break five-nil". The correction is instantaneous. He then plays a top club (unless the defence call the director first), all follow, and he repeats his claim, which by then is accurate.
(Clubs are 5-3 between declarer and dummy, missing the ten-nine).
Is this legit within the law as strictly applied, and if so how long a pause would be needed between "mine" and "oh hang on" to make it not so?