Abiogenesis is the generation of life from non-living matter. It is an abstact concept because it has never been observed. Not only has it not been observed, apparently, according to Darwinian evolution, it has never been repeated. 

The notion of life coming from non-life is the height of absurdity on the basis of a naturalistic worldview. In fact, life arising from non-life crosses over into the sphere of miracles. By miracles in this instance I’m referring to things that would generally be impossible in a naturalistic world without some kind of supernatural intervention. 

Professor of Biology at Harvard University, George Wald, discussed this very topic in a book entitled, “The Physics and Chemistry of Life.” While speaking about the improbability that life could arise from non-living material he said this: “One has only to contemplate the magnitude of this task to concede that the spontaneous generation of a living organism is impossible. Yet here we are—as a result, I believe, of spontaneous generation.”

Why would a biology professor from Harvard so easily admit to believing in the “impossible?” By impossible, he is intending to mean something that cannot, under any circumstance, occur under the natural order. Yet life has occurred. To supersede the natural order of things one must believe some kind of miracle has occurred. So Wald easily admits to believing in the impossible which can be interpreted that he believes in some kind of miraculous action. 

Later, Wald offered an explanation to any possible alternatives to spontaneous generation. To this he said, “The only alternative to some form of spontaneous generation is a belief in supernatural creation.”

So he acknowledges that the only alternative to an unproven idea is supernatural creation but yet he denies supernatural creation. 

This is a textbook example of what Bible readers already know:
“They know the truth about God because he has made it obvious to them. For ever since the world was created, people have seen the earth and sky. Through everything God made, they can clearly see his invisible qualities—his eternal power and divine nature. So they have no excuse for not knowing God. Yes, they knew God, but they wouldn’t worship him as God or even give him thanks. And they began to think up foolish ideas of what God was like. As a result, their minds became dark and confused. Claiming to be wise, they instead became utter fools. And instead of worshiping the glorious, ever-living God, they worshiped idols made to look like mere people and birds and animals and reptiles.” Romans‬ ‭1:19-23‬ ‭NLT‬‬

Atheism is a convoluted mesh of contradictions. 

(Most of the information in this post can be found in the book “The Genesis Flood” by John Whitcomb and Henry Morris on pages 234-235).