Morning Scepticism: Deduction

How we know abiogenesis happened is a matter of deduction. Life at one stage had to arise from non-life. Whatever that process entails, it had to happen. How it happened is still unknown, but for all those who condescendingly mock "how can life come from non-life?" have to accept that it happened. I suppose that's being unfair, as they aren't really suggesting the infinity of life but supernatural intervention. Of course, the deduction of supernatural intervention is only going to be achieved by exhausting every natural possibility, so all it's doing is making a "God of the gaps" argument.