From that same article:
Is Evolution a Scientific Theory?
What qualifies a theory as a scientific theory? According to theEncyclopedia of Scientific Principles, Laws, and Theories, a scientific theory, such as Albert Einstein’s theory of gravity, must
Be observable
Be reproducible by controlled experiments
Make accurate predictions
In that light, where does evolution stand? * Its operation cannot be observed. It cannot be reproduced. And it cannot make accurate predictions. Can evolution even be considered a scientific hypothesis? The same encyclopedia defines a hypothesis as “a more tentative observation of facts [than a theory],” yet lends itself “to deductions that can be experimentally tested.”
Wow... Look at that last paragraph.
"Its operation cannot be observed." Wrong, the fossil record shows how it operates.
"It cannot be reproduced." Well, neither can gravity. We haven't been able to make artificial gravity, yet it's still scientifically sound and accurate.
"It cannot make accurate predictions." Well, yeah, because evolution isn't a person that predicts things. However, scientists can accurately predict how things will evolve depending on the environment you subject them to. For instance, if Kevin Costner's Waterworld were to actually happen, Humans might eventually evolve into several different species of whale-like mammals, although not exactly like whales.