On top of that there's this whole thing where people are constantly using social game theory to reason about what choice of words does or doesn't count as defecting against local norms, what the consequences would be of failing to punish non-punishers of people who use words in a way that differs from ways that are privileged by social norms, et cetera, which make a straight up information theoretic approach somewhat off-base for even more reasons other than just the straightforward ambiguities imposed by considering implicit utilities as well as probabilities. And that doesn't even mention the heuristics and biases literature or neuroscience, which take the theoretical considerations and laugh at them.