On one hand I have evidence that "David" can force himself to train (which, for track athletes, involves running miles in all kinds of terrible weather, often u

On one hand I have evidence that "David" can force himself to train (which, for track athletes, involves running miles in all kinds of terrible weather, often until they throw up). Alternatively, "Steve" sent some emails, did some networking, and ended up in a couple sweet positions. What I meant by "All likelihood" is that, given the information provided, I would wager more on David's mental toughness than on Steve. What is unfair about me making that judgement based on the evidence provided?