There have been 59 athletes who have run sub 27 minutes and of those only 5 have run sub 3:35 for 1500m, sub 13 for 5000m, and sub 27 for 10000 in the same season - Haile, Kenenisa Bekele, Salah Hissou, Mo Farah, and Nico Young.
ONLY two have ALSO run sub 1:50 for 800m - NICO and HAILE.
We are not talking could of, we are talking about have ACTUALLY broken the barriers