"Microevolution is of course a proven thing, and the general evolution is a pure abstraction" i quite agree.
one more excerpt from another book by Jean-Louis Serre; it's another genetics manual, a course book with exercises. JL Serre is a professor in the university where i work.
"i the beginning, with Gregor Mendel, en 1865 [...], the factors of which he had postulated the existence had an only theoric and abstract reality. they constituted a formalism allowing only to show the statistical modalities of hereditary transmission of morphological traits of the peas. it is by the way the ad hoc aspect of this formalism that was at the origin of the relative ignorance/misreading of Mendel's works."
so Mendel started out of pure abstraction and theory. his works made science go forward, as Darwin did in another way, and earlier. people who say that evolution theory is only a theory and therefore has no legitimacy behave just like those who chose to ignore Mendel's theory.
we have to leave room for any theory that makes some sense.


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