I'm not being cheeky. I'm not looking for a mathematical explanation of how to measure forces. I'm trying to figure out if humans have yet to understand what is actually happening in the space between items (those being the things that are exerting forces on one another).
So, taking gravity as an example, we know how to measure its effects, but do we actually understand what it is? I've seen it explained as a dimple in spacetime, but that's not really much of an explanation since the visualization always involves a plane with a divot into which things are falling (apparently being attracted to some unseen pulling force beneath the dimpled surface).
I know there's a very famous Feynman interview in which he quite eloquently illustrates the problem with asking "why" questions, but this isn't a "why" question, this is a "what is it" question. In this interview he describes how charged electrons line up to magnify the magnetic force, but again, that describes the effect. I'm trying to figure out what the force actually *is.
I apologize if this seems like more of a philosophical question than a physics one, but the context is analogous to my saying "do we know what light actually is" and the answer is "it's a bunch of photons traveling at a specific frequency etc. etc" I can visualize this explanation. I'm looking for something comparable for "force".