Comment by q-base

This holds true across so many fields. I believe parts of this is in play in physical space as well. When breaking the World deadlift record. 500kgs seemed impossible until someone broke the barrier. Then suddenly others follow. Sub 10 seconds 100 meter was out of reach at some point. Bolts 9.58 seems almost impossible to beat and maybe that is why it isn't. There are of course barriers to physical performance, but I would agree that the general sentiment on where they are play a larger role in placing them than the actual limitations.