Maybe like a staple in a pile of two dimensional papers, whilst the individual papers will feel the effect of the staple and understand it from one dimension, t

Maybe like a staple in a pile of two dimensional papers, whilst the individual papers will feel the effect of the staple and understand it from one dimension, they wouldn't know about the other bits of paper, they can infer them from the effect of the staple perhaps, but unable to directly or indirectly know for sure. Maybe that will change, but until then, it's a nice way to visualise things.