Maybe it depends on what precisely is meant by "sense". We apparently use our olfactory system to help determine taste, but characterize that mechanism of part of our sense of taste, right?

By the same token, if our approach is to define a sense by the utility derived from interpreting sensory input toward a certain outcome, and we recognize that developing a conceptual model of a surrounding environment can be characterized as distinct from other applications of evaluating auditory sensory input (verbal processing, for instance), then does the clarification as a different sense ... make sense? Lol; pun intended!

Perhaps this is an area that is well defined (and is be interested in learning more of the nuance), or maybe it's something that could use some specificity from the scientific community....