There are 'four' experimentally proven dimensions. Anything and everything must be defined by 'four' dimensions. It doesn't make sense to me to say "An Object exists in two dimensional space" or "Three dimensional." To mean there is one dimension, what everything exists in, defined by (x,y,z,t). For example: A circle on a piece of paper is called two dimensional. But it has a height, albeit small, and exists in some reference frame. So what is the first dimension, the second dimension, the third dimension. My logic tells me since nothing can exist in these dimensions, they themselves don't exist.