the next goalpost?
A philosophical preposition of what science should be cannot be logically deducted to science. Science is already defined. "What science should be" would require new definition and method and would not be science but a thing that is different. It would require unknown new philosophical thought which is possible but not likely.
>how much has been assumed: First, that the pre-biotic atmosphere was chemically reductive...
Gee, what a leap of faith... that the early Earth was just like the rest of the universe.