I'm certain he thinks jl777 is the founder of the Ripple based insurance startup 'PeerCover', which I know is false.
Yeah, sure he isn't.

I'll bet you 25 btc jl777 is not Jared Mimms. We can use a recognised and trusted escrow.
I would love to take your money, and I bet you'd love to take mine.
If you're sure jl777="Jared Mimms" and you can prove that, take the bet.