No Abiogenesis, no Evolution, then what?

The invisible pink unicorn did it.There is still a possibility of panspermia. In particular, if the universe has existed forever, then it is conceivable that life always existed, and is distributed via panspermia (suitable organic molecules being distributed into space). Granted, current cosmology suggests a finite age for the universe, which would rule this out. But I think it hasn't yet been completely ruled out.

Right. The idea is that life has always existed, and so abiogenesis is not required. See, also, Message 15.

That depends on what is being counted.I guess you are ignoring the assumptions of the OP, and talking about ways that life could be present. In that case, yes, I am aware of three: However, it is my opinion that (2) is indistinguishable from (1). That is, God works through nature, not against it, so a creation event would be a spontaneous event that occurred through natural means. And current cosmology makes (3) look unlikely.

The analogy is bad.A bird builds a nest. I expect that takes some intelligence, but not a lot. We could consider it a puzzle, take it apart, and examine the complexity of getting every piece back into exactly the same position. But the bird never needed to solve that complex puzzle. It can put the pieces back together in a different arrangement and it would still work as a nest.Maybe there are many different ways of building something that functions as a cell. Maybe the cell itself evolved from something far simpler.

I'm glad that you are not going to repeat it.Nevertheless, the puzzle analogy is bad. Treating it as a puzzle assumes that there is only one way that there could be a living cell. But you have given no argument or evidence to support that assumption.

But we still are not dealing with puzzle solving. In a typical puzzle, there is a fixed set of components, and a unique way to successfully put them together. For abiogenesis, there were many components and many possible ways to successfully put them together. Self reproducing life only had to arise once. It didn't have to be done continuously. If it occurred once by random combinations, that was sufficient.In any case, the topic we are supposed to be discussing is whether there are alternatives to abiogenesis. Let's get back on topic.