I would accept any sufficient quantity of evidence as sufficient proof of anything. You could convince me my head was made out of cheese if you could provide enough evidence (good luck with that

). Not everything is scientifically proven by mathematical formulae or studies. Most of the time it comes down to presenting the cold, hard facts.
That's an inaccurate statement: most historians accept the New Testament texts are get the gist more or less right, in that there was a man called Jesus who did founded the Christian religion, etc. They're decidedly less certain on the authenticity of the miraculous claims. Appeals to authority are infamous around here. Simply stating that most historians accept the Gospels as gospel truth (ba dum tish) is hardly conducive to civil debate.