“No critic and advocate of immutability has ever once managed properly or even marginally to outwit the English language's capacity for foxy and relentlessly slippery flexibility. For English is a language that simply cannot be fixed, not can its use ever be absolutely laid down. It changes constantly; it grows with an almost exponential joy. It evolves eternally; its words alter their senses and their meanings subtly, slowly, or speedily according to fashion and need.”