PSacramento, you make a good point. Many creationists will still (intentionally or otherwise) confuse evolution with "first cause", whether that is god, abiogenesis, freakin' aliens, or whatever.
Evolution is an observed fact. Evolutionary theory explains and describes that fact, using the available data. "First cause" has never been a part of evolutionary biology, but many still don't realize that...and the WTS is only too happy to take advantage of, and perpetuate, that ignorance.