Reversing calls is always a difficult thing to do. However, if it is in the interest of geting it right - sometimes it is required. It is never, as coaches and fans sometimes ask, an Overrule. If an official is 150% sure that the call got booted, although I can only think of OOB situations where this might happen, he/she should go to their partner and ask if he/she was sure about the call. If the partner is receptive, discuss it and let him or her signal to retain or change.
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