In his essay "on Duties", Cicero remarked that nobody, to his knowledge, had yet set down the rules for ordinary conversation, though many had done so for public speaking.

"We are still dealing with a single cluster of swine flu cases, all associated with this one school," Bloomberg said, adding that to his knowledge all of those infected with the virus were improving.

The idea of handing down his knowledge from generation to generation is important to McLean.