No, it is quite possible they have missed something in that case. And the way to determine that is through further testing and investigation.What, and if they only find one answer, that has to be the way it happened?
It is not acceptable in the same way that an Earth centered solar system isn't acceptable. It doesn't make correct predictions (in the case of a deity, it makes NO predictions) about actual observations.In science the God did it answer is not acceptable, that is true.
Once again, logical possibility is a very, very weak filter for truth. many things are logically possible, but false in fact.The answer that God did not do it because we have found what we think of possible ways something could have happened may be acceptable in skepticism but logically it is not acceptable for me.
For a skeptic the places where abiogenesis etc might fall down don't really matter anyway, the theory is accepted already, after all God and spirit cannot be found by science.
No, there is no accepted theory of abiogenesis. We know that at some point things that were not alive changed into things that were. But that is true of the God story as well. it's just that science knows that life is a type of complex collection of chemical reactions, so the most reasonable place to start investigations into how it started will begin with chemistry.
In contrast, we have NO evidence of a supernatural, so postulating a supernatural to explain the origin of life just makes two unknowns in place of one. It has absolutely no explanatory power.