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lost in the underflow

   more specifically, small beyond the limits of accuracy or
   measurement.  This is a reference to `floating underflow', a
   condition that can occur when a floating-point arithmetic processor
   tries to handle quantities smaller than its limit of magnitude.  It
   is also a pun on `undertow' (a kind of fast, cold current that
   sometimes runs just offshore and can be dangerous to swimmers).
   "Well, sure, photon pressure from the stadium lights alters the
   path of a thrown baseball, but that effect gets lost in the
   underflow."  Compare epsilon, epsilon squared; see also
   overflow bit.