After skimming the story, I'm still unclear about a few details: (1) In whose judgment must the argument count as "proof"? Epic's, or a court of law's, or some

After skimming the story, I'm still unclear about a few details: (1) In whose judgment must the argument count as "proof"? Epic's, or a court of law's, or someone else's? (2) With $1M at stake, it could make sense to sue Epic for the bounty. Is there some legally valid contract that lets Epic avoid that?