K-Lo has hit the nail on the head here. As well the language of the rule itself are all facts.
"Poker is a game of alert, continuous observation. It is the caller’s responsibility to determine the correct amount of an opponent’s bet before calling, and to ask for verification of the amount by the dealer if there is doubt as to the correct amount."
It is the intention of the rule that falls short. K-Lo's change to it makes the rule excellent and something that I would stand behind. Adding the fact that the dealer is impartial and can be counted on for the information is exactly what we should be relying on as players. The dealers count should verfiy the count we make ourselves and that should be enough to protect ayone from misinformation.
"However, if a caller requests a count and receives incorrect information from the dealer, and then places that amount in the pot, the caller will only be responsible for the lesser of (a) the actual amount of the wager and (b) the count given by the dealer, provided there has been reasonable opportunity for players to draw attention to the dealer error."