In this paper, I explore the idea that under one way of understanding cheating, Armstrong did not fulfill any of the three necessary conditions: that cheating violates a rule—I will make the case that though doping was against the official rules, it was not against the rules the athletes used; that it is cheating if the intent is to obtain an unfair advantage—I will argue that dopers were not attempting to obtain an unfair advantage, at least on one plausible understanding (...) of fairness; and that cheating requires fair enforcement of the rules—I will show that the official rules against doping were hardly enforced at all, much less fairly enforced, and thus lacked enough sufficient normative force to deem breaking them cheating. (shrink)