1. A method of recognizing an input identifier, comprising: a) providing a recognized identifier based on the input identifier; b) comparing the recognized identifier to a current set of reference identifiers; c) determining a reference identifier from the current set of reference identifiers that matches the recognized identifier; d) prompting a user with the matched reference identifier; e) excluding, if the user rejects the matched reference identifier, the matched reference identifier from the current set of reference identifiers to create a new current set of reference identifiers; f) repeating steps b) to e) so long as the user indicates that a current matched reference identifier does not correspond to the input identifier; and g) ceasing step f) if a predetermined number of reference identifiers are excluded from the set of reference identifiers, wherein each rejected matched reference identifier is excluded from the current set of reference identifiers while steps b) through e) are being performed.