[throwaway173738]

If you’re betting with a friend that they won’t have chicken for dinner, what’s to stop them from having chicken for dinner? What if you bet with a complete stranger who also took the reverse of that bet from your friend?

[lotsofpulp]

Nothing, that is why you quickly learn to not make stupid bets like that. If you don’t learn, then I guess survival of the fittest and all that.