 There are, more actually, strong arguments on both sides.Enumerative induction obviously occurs as a summary "conclusion", but its literal operation is unclear, as it may, as Popper explains, reflect deductive inference from an underlying, unstated "explanation" of the observations.In a 1965 paper, now classic, Gilbert Harman explains enumerative induction as simply a masked effect of what C S Pierce had termed "abduction", that is, i"nference to the best explanation", or IBE.