ahhh

When people try to say to me that evolution is only a theory and creationism is just as valid, I say to them; well let's say you want to work in animal or plant biology producing vaccines or some other up to the minute technology, if you wish to actually achieve anything you will need to work with the principles of evolutionary theory because these principles are the ones that actually work. And so using the old addage that if it looks like a duck, flys like a duck, and waddles like a duck, then it is a pretty good chance it's a duck. So if you have to use evolution and evolution is what works in the job then you had better start considering evolution as being what is real.

They do it is called willful ignorance the ones coming up with the theory know they are making it up as they go. The morons who believe it throw out or refuse to listen to any evidence that disagrees with or disproves it. You see the same thing with the Climate Change deniers.