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San Francisco 49ers tight end Vernon Davis indicated Sunday he's getting reps at wide receiver.This means ... what? Let's walk through this.2012 Davis from Kaepernick by AlignmentDefenses must set their personnel before they know where offensive skill players will line up in the formation. If they see Davis in the 49ers' huddle, for example, they know they have to contend with an exceptionally fast tight end. They also know Davis might line up where wide receivers line up, but they cannot treat him the way they would treat a 195-pound wideout.