That is the 'defense' that evolutionists always give - the opponents do not know what the theory of evolution is. Evolutionists are always saying what evolution is not, they never are willing to say what the theory of evolution is. For two years I have been trying to nail evolutionists down on what the theory is but they lamely refuse to state it or even more lamely give a stupid answer about the " change in the frequency of alleles within a gene pool from one generation to the next." which of course is not what the theory of evolution is. To go for a definition instead of the chicken hearted mumblings of evolutionists we must go back to Darwin:
"It is interesting to contemplate an entangled bank, clothed with many plants of many kinds, with birds singing on the bushes, with various insects flitting about, and with worms crawling through the damp earth, and to reflect that these elaborately constructed forms, so different from each other, and dependent on each other in so complex a manner, have all been produced by laws acting around us. These laws, taken in the largest sense, being Growth with Reproduction; Inheritance which is almost implied by reproduction; Variability from the indirect and direct action of the external conditions of life, and from use and disuse;. a Ratio of Increase so high as to lead to a Struggle for Life, and as a consequence to Natural Selection, entailing Divergence of Character and the Extinction of less-improved forms. Thus, from the war of nature, from famine and death, the most exalted object which we are capable of conceiving, namely, the production of the higher animals, directly follows."
From: Charles Darwin, "On the Origin of Species by Means of Natural Selection, or the Preservation of Favoured Races in the Struggle for Life"