Why is "up" up, and "down" down?

Question

Why is "up" up, and "down" down?

Answer 1

I dont think you were satisfied by the above answer.

Well up is only up because our elders have taught us that up means the motion of object or some thing notes towards sky from bottom, if they have had taught us any different name say kin you would the object is kin. And you would have ask the as why is 'kin' kin only!!! Hope you have understood now.

Answer 2

You're a r****d!

Answer 3

Up and down are relative directions like left and right.They vary according to the position of the observer,and the words themselves have been agreed by common usage.There is no reason why you cannot refer to these things by other terms,but unless you agree those terms with your audience beforehand things may get confusing.In short "up" is only "up" because we agree that it is.