Reasoning draws a conclusion, but does not make the conclusion certain, unless the mind discovers it by the path of experience.
Roger BaconBut we must here state that we should not see anything if there were a vacuum. But this would not be due to some nature hindering species, and resisting it, but because of the lack of a nature suitable for the multiplication of species; for species is a natural thing, and therefore needs a natural medium; but in a vacuum nature does not exist.
Roger Bacon