[quote=@ImportantNobody]
Trust isn't always about if they are intentionally cheating. You can't trust me to know if someone who can punch through a brick wall could also lift a van with that same level of strength, as but one example. So that leaves me with rule of cool for what I think sounds right in my head. I'm fine with doing stuff like that, even if I'd probably just underestimate myself and have them fail.
[/quote]

Some times your own judgement can actually be the only worthwhile aid. Namely if you're trying to be fair, honest, and truthful then aren't you still honoring the system of the arena even if you might be wrong? Effort, at least to me, usually counts more than success because it means you value honor more than actually whipping my ass and gaining bragging right. 

To be perfectly bunt, you can't account or determine everything in the arena because it's a fantasy/textual setting. In addition, replies are points of views from PCs so it's the character's isn't it? They might not know this stuff either or even care and some people write from their PC's point of view. At least that's how I usually rp in arena is from my PC's point of view. Not sure about everyone else.