What beliefs would we consider reasonable for a self proclaimed Christian to hold?

[GrandizerII]

Peer-reviewed by whom? Peer-reviewed does not always mean scientific.

Science does not have all of the answers. Some people believe that scientists know how life began, but they don't know. There are many scientific hypothesis regarding the beginning of life and none of them are provable. So if you want proof you are not going to find it.

Don't worry. Just give it time, and they'll figure out exactly how life began on earth. We don't just go for a "God explanation" for something just because we haven't figured out yet how it came about. God is not even an explanation. It's just a filler of knowledge gaps. The best stance is simply to acknowledge ignorance on the matter, and wait/hope for some actual explanation to emerge eventually.

That said, I am confident that abiogenesis, broadly speaking, has happened on this planet, in a similar way that I am confident lightnings occur due to purely natural processes (even though scientists are still trying to figure out exactly how they occur). So it's not Zeus throwing lightning bolts or anything like that.