That's a bit misleading because it neglects the history and changes of how things were, and how they are now. Communication by words and language in general is

That's a bit misleading because it neglects the history and changes of how things were, and how they are now. Communication by words and language in general is the sharing of meaning. At one point, each word had a distinct and unique meaning, that may have depended on context, but it always followed rational principles in the definition. This is no longer the case. Words have been corrupted so that by definition (formal or informal/spoken), they may have two potentially contradictory meanings. Fallacy and other deceit then creep in, and without a direct unique and non-contradictory definition, you can't communicate anything; even if it sounds like communication (it isn't when meaning isn't shared).