The Simple Cavemen continue their evolution from suburban patio dwellers into sophisticated beings skilled at striking stringed instruments and drums. Here is their story, recently found scrawled in primitive handwriting on the bathroom walls at a Central Florida Waffle House: In the beginning, there was a Phil Hartman skit on Saturday Night Live. And it was good. There was music by Bob Dylan and Doug Sahm, Jerry Garcia and Johnny Cash. There also was Hank Williams. And that was very good. There also was a cowbell skit on Saturday Night Live and it inspired much laughter — but that’s not important now. Three chords and the truth. That’s how people described the power of a Hank Williams song. To the Simple Cavemen, three chords sounded simple enough, although they weren’t above using just two if that worked.