you can hide and be silent about what is in the hand.
but cannot ignore what is broken on the mind.
(discussing if impurity is overridden or permitted when the priest is performing a rite on behalf of the community. if something is impure in the hand, and there is no substitute, the priest is to be silent and continue with the ritual. at the end of the page is discussed the tzitz, the piece of metal worn on the forehead of the High Priest. There is a debate if it always needs to be worn for offerings to be accepted. But all agree that on the forehead, or hanging on a peg, if the tzitz is broken the offerings are not accepted)