The fact that plants and animals change (evolve) only suggests that they did it.
Yes, but not everyone agrees even on that. ( Biblical fundamentalists ).
I thought that's what we were talking about.
Natural selection always sounded plausible to me... but i'm certainly
open to other theories and evidence...although doesn't seem like
anyone can really explain those mechanisms.
Complex mechanism may be able to be described, but it won't be easy. It would be like have a hundred Bitcoins systems, that were all radically different from each other, and yet did the same job, and worked together as one. Who could hold such an operation in his head? It could be written down, but it almost wouldn't be understandable. Someone with a reasonably clear picture of it might be able to describe it to us lay-folk, but we would have to trust that his explanation was accurate and truthful, rather than that he was simply propagandizing and politicizing his own points of view.