Another fallacy that could be pointed out here is the fallacy of poisoning the well.
But of course, you will make any claim and say anything to avoid dealing with the reality of Lewontin's statement. Too bad you don't understand what science is and what it is not. Science is exactly what Lewontin said it was and is not an empirical standard by any stretch of the imagination.
You pick out a quote from ONE Marxist to support your opinion and you want us to accept it as fact? Get Real!
Interesting that you admire Mr. Lewontin so much as to accept his word without question. Let's examin Mr. Lewontin's statements.
It is time for students of the evolutionary process, especially those who have been misquoted and used by the creationists, to state clearly that evolution is a FACT, not theory, and that what is at issue within biology are questions of details of the process and the relative importance of different mechanisms of evolution. It is a FACT that the earth with liquid water, is more than 3.6 billion years old. It is a FACT that cellular life has been around for at least half of that period and that organized multicellular life is at least 800 million years old. It is a FACT that major life forms now on earth were not at all represented in the past. There were no birds or mammals 250 million years ago. It is a FACT that major life forms of the past are no longer living. There used to be dinosaurs and Pithecanthropus, and there are none now. It is a FACT that all living forms come from previous living forms. Therefore, all present forms of life arose from ancestral forms that were different. Birds arose from nonbirds and humans from nonhumans. No person who pretends to any understanding of the natural world can deny these facts any more than she or he can deny that the earth is round, rotates on its axis, and revolves around the sun.