October 28, 1984 Is It O.K. To Be A Luddite? By THOMAS PYNCHON s if being 1984 weren't enough, it's also the 25th anniversary this year of C. P. Snow's famous Rede Lecture, ''The Two Cultures and the Scientific Revolution,'' notable for its warning that intellectual life in the West was becoming increasingly polarized into ''literary'' and ''scientific'' factions, each doomed not to understand or