Mr Chivers overlays a street map with colours representing the different substrata - " half eccentric artwork, half primary-school science project" - which becomes a springboard for his digressions.
And, " I really have not patience with the general, " was uttered twice after Mr. Allen left the room, without any relaxation of anger, or any material digression of thought.
When I get a score report from a student and it says writing 12 points or it says independent writing 1.0, I know it's almost guaranteed they got flagged as being off-topic.