Ah well, Stu, it seems I can't shake your faith in the Megalab Snail Hunt even though it comes from a course you say was really terrible and totally lacking in scientific vigour. I still don't think it shows me evolution in my backyard.

As for "Wayyyyyyy too fuzzy.", on the one hand we have -

American Association of Physics Teachers, American Astronomical Society, American Chemical Society, American Institute of Biological Sciences, American Institute of Physics, American Physical Society, American Physiological Society, American Society for Investigative Pathology, American Society for Pharmacology and Experimental Therapeutics, American Society of Human Genetics, Biophysical Society, Consortium of Social Science Associations, Geological Society of America, Federation of American Societies for Experimental Biology, National Academy of Sciences, National Science Teachers Association, Society for Developmental Biology

On the other hand we have -

Stu.

By all means challenge everything but describing something as fuzzy isn't challenging, it's just brushing aside something you find inconvenient. As you advance in your field you won't just have to convince yourself but others as well and if you challenge orthodoxy you will have to put up a very good case. "Fuzzy" won't hack it. Barring the occasional revolution , science advances by building on what's there. Newton wrote " If I have seen further it is by standing on the sholders of Giants."