Why is it upper bound and lower bound and not higher bound and lower bound?

My first search revealed this is a mathematical concept. So you should direct this question to whoever first coined the term. The definition is below.

https://www.mathsisfun.com/definitions/upper-bound.html

What about upper limit and lower limit? Is that also mathematics? Surely it is not just mathematicians that use these terms.

It’s upper and lower floors in a building too. I don’t have a problem with it, just a convention of the language.

@janbb But often people are warned to not stay on the “higher floors” in a building.

As far as bounds, or rather, boundaries, the mathenatical term is referencing the placement of one of two bounds, the upper and the lower. For instance, if I asked for the range of values of (X-(x+/-2) the upper bound would would be 2, the lower bound would be -2.

Okay, what about upper arm and lower arm or lower jaw and upper jaw? Or lower deck and upper deck? There is definitely a strong preference for using upper over higher.

I think you’re only arguing with yourself. No one’s disagreeing.