4th d individuals are luminous and so devoid of melanin that they glow brighter than federal agents. This is why experiences with them are always accompanied by bright flashes of light on their arrival since they are briefly witnessed in a 4th d which our eyes can't properly convey to the brain. So in short niggers are too dark to ever be 4d beings.
Every physical object in our current reality exists in the fourth dimension. A rock going through time exists in the fourth dimension.
Can a nigger conceptualize the fourth dimension? Understand it? Of course not, no more than the rock can. For the nigger there is only the present moment, the third dimension.