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Top 100 Atheist Challenges

We have SEEN speciation occur in various species of plants. Evolution in action, folks. This should establish beyond all questionable doubt that evolution is a FACT!

Au contraire; what speciation establishes, at best, is that instances of macro-evolution have occurred.  But the theory with which Christians take issue is the theory of common ancestry, which is the thesis that all species originated from a single organism. Speciation as such does not entail this claim, and  is thus perfectly compatible with the view that God initially created a certain number of separate and distinct species, from which additional species evolved over time.  The argument therefore commits the fallacy of ignoratio elenchi (irrelevant conclusion), since (if successful) it proves something which is not actually germane to the debate.