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Pierre Grasse stated the following: "Some contemporary biologists, as soon as they observe a mutation, talk about evolution. They are implicitly supporting the following syllogism: mutations are the only evolutionary variations, all living beings undergo mutations, therefore all living beings evolve....No matter how numerous they may be, mutations do not produce any kind of evolution." Grasse pointed out that bacteria which are the subject of study of many geneticists and molecular biologists and are organisms which produce the most mutants are considered to have "stabilized a billion years ago!".<ref>[http://www.veritas-ucsb.org/library/origins/quotes/mutations.html Pierre Grasse regarding mutations]</ref> Grasse regards the "unceasing mutations" to be "merely hereditary fluctuations around a median position; a swing to the right, a swing to the left, but no final evolutionary effect."<ref>[http://www.veritas-ucsb.org/library/origins/quotes/mutations.html Pierre Grasse regarding mutations]</ref>
Pierre Grasse stated the following: "Some contemporary biologists, as soon as they observe a mutation, talk about evolution. They are implicitly supporting the following syllogism: mutations are the only evolutionary variations, all living beings undergo mutations, therefore all living beings evolve....No matter how numerous they may be, mutations do not produce any kind of evolution." Grasse pointed out that bacteria which are the subject of study of many geneticists and molecular biologists and are organisms which produce the most mutants are considered to have "stabilized a billion years ago!".<ref>[http://www.veritas-ucsb.org/library/origins/quotes/mutations.html Pierre Grasse regarding mutations]</ref> Grasse regards the "unceasing mutations" to be "merely hereditary fluctuations around a median position; a swing to the right, a swing to the left, but no final evolutionary effect."<ref>[http://www.veritas-ucsb.org/library/origins/quotes/mutations.html Pierre Grasse regarding mutations]</ref>
Grasse also wrote the following:
{{cquote|Through use and abuse of hidden postulates, of bold, often ill-founded extrapolations, a pseudoscience has been created. It is taking root in the very heart of biology and is leading astray many biochemists and biologists, who sincerely believe that the accuracy of fundamental concepts has been demonstrated, which is not the case. Evolution of Living Organisms (1977) p.6
Today, our duty is to destroy the myth of evolution, considered as a simple, understood, and explained phenomenon which keeps rapidly unfolding before us. Biologists must be encouraged to think about the weaknesses of the interpretations and extrapolations that theoreticians put forward or lay down as established truths. The deceit is sometimes unconscious, but not always, since some people, owing to their sectarianism, purposely overlook reality and refuse to acknowledge the inadequacies and the falsity of their beliefs. Evolution of Living Organisms (1977) p.8
It follows that any explanation of the mechanism in creative evolution of the fundamental structural plans is heavily burdened with hypotheses. This should appear as an epigraph to every book on evolution. The lack of direct evidence leads to the formation of pure conjectures as to the genesis of the phyla; we do not even have a basis to determine the extent to which these opinions are correct. Evolution of Living Organisms (1977) p.31}}
[[Theodosius Dobzhansky]] wrote regarding Pierre Grasse:
[[Theodosius Dobzhansky]] wrote regarding Pierre Grasse: