Have you ever played Battleships? You know, with the square grid, and the (X,Y) coordinates. Yes? Ok - you know, they have this 3D version, where you have to guess the (X,Y,Z) coordinates of spaceships. Right. Now can you imagine a 4D version... how would you imagine it? You can't, spatially... but in theory it's the same thing, right, now you just need to be looking for enemies with a (W,X,Y,Z) tuple. The number of dimensions in the space doesn't matter! The space could have ten dimensions! E.g. (Q,R,S,T,U,V,W,X,Y,Z), right? Ok. So your coffee calibration model is like that. (It doesn't matter if it's physics, or finance, this is just how systematic modelling works.) Remember, we're just walking through a space... it's just what I do when I get bored.