A rather profound statement. At the pedestrian level this statement seems laughable but when you approach it honestly and intellectually you will find it is very default to "prove" the nature of reality. That said - now what - we can just give up and take bong hits, eat gummy bears, watch TV, and have sex OR we can just understand there is very little certainty in the known universe (and then do the other stuff). The only real problem is it deflates intellectual arrogance.