[donh]

You need to do two things. Give an example of how a historical event can be falsified without relying on some other historical event to do so. And explain how abiogenesis as a whole can be falsified.

Science cranks are always holding up hoops of their own devising for science to jump thru, and then raising a ruckus when science pays them scant heed. We'll get over your problems with historical data. Kindly tell me what data astonomers look at, that's contemporaneous, that tells them the story of the Big Bang?

[unlearner]

"always holding up hoops of their own devising for science to jump thru"

You said yourself that falsification was a requirement for science. Do you think it is possible to falsify a prediction or hypothesis using data which itself is not testable or falsifiable? If so, how? If not, then how are prehistoric historical data falsifiable?

Is this a hoop to jump through? If so, I guess falsifiability means whatever you want it to mean.