The decision-makers at Channel 7 must be slow learners. What else could make them keep dispatching Farrah Fazal to cover live events? Friday night found Fazal reporting from an exit on I-80 where a fatal accident had just occurred. When the folks in the studio threw it to her, viewers were treated to what sounded like incoherent babbling punctuated by a generous dose of "ums." We didn't copy down