## Review: Lattice Theory of Information

** Published:**

Claude Shannon, known as the father of information theory, is little known for his contribution to none other thanâ€¦lattice theory. In this paper, Shannon introduces a metric lattice of discrete stochastic processes, but his *information lattice* makes sense in any setting where conditional entropy is well-defined. This paper is very short, only a half-dozen pages, but contains a numerous amount of insight into the ultimate question in his field: *What is information, actually?*