Why Evolution Is True

If evolution is a scientific theory worth its salt, then there must be some conceivable observations that could show it to be wrong.  I just wanted to put down, for the record, what some of those observations might be. First, let’s reprise what I see as the major components of the theory of evolution.

  1. Evolution occurs, that is, there is gene frequency change in populations over generations.
  2. Significant evolution takes time—that is, it usually (though not always) requires hundreds to thousands of generations to occur. It is not instantaneous, and it is the population and species rather than the individual that evolves.
  3. Lineages of organisms split, or speciate, so that the single lineage that gave rise to life 3.5 billion years ago has undergone numerous splitting events to produce the millions of species alive today (and also the even more millions that went extinct).
  4. The converse of #3: any…

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