isn't that what evolution is all about, explaining how these things happen?I believe you're misunderstanding an argument somewhere. None of the papers or researchers I've seen you cite has expressed the slightest doubt that the major transitions of evolution occurred. What some claim is that there's no (or little) empirical evidence for how they happened. The first is the fact of evolution: we share common ancestors with all other known life on this planet. The second is the theory (or theories) of evolution: how and why those changes have occurred.
making a statement such as "one life form came from another" is simply that, a statement.
there is no clear evidence that such a thing happened.
the only evidence i've seen in this regard is the ability to trace gene history through deep time.
this however doesn't make any sense in the light of such things like base insertions, this sort of thing would soon erase any gene history.
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