Mark
CreativeMountainGames.com
Coming back to this, albeit without the actual quote in hand, I am guessing that what is happening here is that the above Gygax quote was meant to stave off brand dilution and trademark confusion given that by the early Eighties there were half a dozen fantasy roelplaying games as well as many non-fantasy rulesets on the market, and people were already beginning to generically call any RPGing "D&D" rather than refer to them individually. His statement is unlikely to have been meant as a cudgel against innovation in the game or house ruling or adjudication on the fly with the rules being meant as guidelines. Given other things he wrote regarding rules as guidelines, such characterization of that statement rings false.