Darwininan Claim Rebutted

The claim of evolutionists is that
"because genetic variation has been observed, increases in net genetic complexity have occurred. Though the mechanism for genetic variation may be mutation, there is no proven mechanism for increased net genetic complexity, which evolution requires. [Evolutionists and their writings] mask this scientific weakness. They define evolution as 'change over time' or 'descent with modification,' as 2 very different concepts --observed genetic variation (antibiotic resistant bacteria, e.g....)and unobserved increases in net genetic complexity (i.e., new genes) --the former supposedly validating the latter. Yet with no mechanism for the appearance of more complex kingdoms, phyla, and classes, evolutionary theory cannot explain biodiversity." (info at textbook reviews.org --Ed.Research Analysts)