MUFFIN calls a user-supplied routine to classify candidates. In this routine the candidates are compared to a set of parameters and it is determined if they indeed stem from a traversing muon. Should the classification be positive the candidate is removed from the event and processing ends. If the candidate is not positively identified it will be stored in the output for further study, but processing continues. Table 6.2 lists the muon classification cuts together with a description of the type of muon candidate found by the cut.