Each trader gets to roll one 2000-sided die using 

 or a fork of it. Only your first roll counts and you have to have made at least one trade before rolling the die. If you roll 1337 (and no one can find 

 proof that you've cheated in the following 72 hours) the market resolves YES. If no one rolls 1337 by EOY, resolves NO.

, as long as no one can prove you did it. If you get caught, your roll doesn't count and you can't try again. You can still trade on this market, and there should be no social repercussions. If you want fair gambling, you should bet on 

If you are using a fork of FairlyRandom, it has to be using the same randomization mechanism as some version FairlyRandom, not earlier than this the last 

Some things which are sus but not sufficient proof of cheating: