"proof" really is hard for you, isn't it?<quoted text>
Wait a tic!
Weren't you just arguing with Buck that we have no evidence of abiogenesis???
Now you're saying "All current evidence suggests that life originated once, about 3.8 billion years ago, from abiogenesis."
No, that's not what I said to Buck. I discussed the situation with him from the point of view of his "IF" - if we can never demonstrate abiogenesis. That was where his discussion started from.
However, as I wrote, all our sciences predict abiogenesis. Further, biochemistry and molecular biology demonstrate it's the only likely explanation - did you read Aero's excellent news piece? Moreover, the biochemists are testing possibilities.