Please help settle a bitter debate at Canterbury

buddy calls river card, says, "what's the odds of that?" I say 1/46, he says no way, it turns into a side bet.

Even money bet. I get 52 chances to call either a turn or a river card exactly. I cannot continue to call the same exact card.

I am using my hole cards, any exposed cards, the board cards, and general hand reading ability to make the best possible guesses.

The debate is who has the best of it? The one calling the cards with 52 opportunities or the one holding the bet?

There is now a $1000 side bet on who has the best of it.

Thanks!

Bryan