    Sentence 1: The so-called diskette is a flat  black square of rather tough’ plastic. with a  hole in the middle and an oblong slot on each  of the flat sides; it is said to -be 5 inches  square, but that is a as.the only person who  probably ever measured one of these things, I  can tell you it is 5:3/16 inches square; that  may. seem irrelevant, but it is only the  beginning of the Great Deception.    Sentence 2: The. item called a diskette is  tmade of plastic.