premise: 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 .
hypothesis: Diskettes are not used any more , and true is true .