Stanford Professor Paul Ehrlich says that the Theory of Evolution is “outside empirical science.”
Ehrlich, Paul and L.C. Birch (1967), “Evolutionary History and Population Biology,” Nature, 214:349-352, April 22, p. 352
Our theory of evolution has become, as Popper described, one which cannot be refuted by any possible observations. Every conceivable observation can be fitted into it. It is thus “outside empirical science” but not necessarily false.
No one can think of ways in which to test it. Ideas, either without basis or based on a few laboratory experiments carried out in extremely simplified systems have attained currency far beyond their validity.
They have become part of an evolutionary dogma accepted by most of us as part of our training. The cure seems to us not to be a discarding of the modern synthesis of evolutionary theory, but more skepticism about many of its tenets.