Is it pronounced: (a) 'tupul', being derived from "two-tuple, three-tuple, multuple"; or (b), 'toople', eg. an innovation of Jimmy J. Tuple. I pronounce it "tupp'l", sounding like "supple". I've heard it pronounced "tyewp'l", sounding like "pupil". The word "scruple" is pronounced like "screwp'l", which would better fit the "tyewp'l" pronunciation.