And yet another reason to doubt the 1997  Apparently, the IBM/MCI program recorded no 500-footers from 1988 to 1996.
The IBM/MCI program recorded hundreds of 500-footer in 1991.
mnli hypothesis: The IBM/MCI program recorded hundreds of 500-footer in 1991. premise: And yet another reason to doubt the 1997  Apparently, the IBM/MCI program recorded no 500-footers from 1988 to 1996.