Also, I imagine you've noticed that if two people get involved in a more in-depth discussion about particulars, there's typically no common agreed upon definiti

Also, I imagine you've noticed that if two people get involved in a more in-depth discussion about particulars, there's typically no common agreed upon definition (or interpretation of "facts") for the word "rational", or many other of the words we use. Yet we carry on oblivious. Row row row your boat...