@JennieFuchsia Jennie: As I dimly understand it, the law permits copyright or patent unless the product is a "natural law". Most mathematics would seem to be products of logic = "natural laws". In my Perspective studies I was solving (inventing) new picture images methods and the question arose -- could I copyright or patent these? New systems of cartography can be copyrighted (or patented). If the theories of Modern Art are correct and Perspective is not a Natural Law of Science -- only a drawing method -- then why could I not patent new methods? The ice gets mighty thin. I finally decided I didn't want to pay for the copyright/patent filing processes, and I especially didn't want to pay legal fees to defend the "ownership". I wanted the ideas to proliferate; and the audience of interest is so tiny, so unprofitable-monetarily, that I didn't want to impede anyone else's fun with my attempt to setup a toll-booth. Jim Barnes