Regardless of who you are, where you are born, what religion you belong to, we can agree that there are things. We live by things being what they are. For example, a game of tennis can be played and enjoyed because we agree upon the nature of the world and its properties. Everything from not falling out of one’s bed to the exploration of the universe relies upon our agreement of the nature of the world.
From things we infer the properties of space. And from things and space we infer the properties of time.
From experience we understand or know The World, that is, things, space, and time.
Rationality is a process of a thing that experiences things, space, and time.