Mark doesn't have to rely on the general rules about derivatively classifying information given to him by his colleague based on the assumption that his colleague is very experienced.
His colleagues highly experienced doesn't validate the general rules about derivatively classifying information.
General rules about a phenomenon should be based on proven facts over the years that has become rules.
Mark shouldn't trust his colleagues experience about derivatively classifying information.
It shows the style of dance , how people dressed and the overall topic and talk of the Jazz Age . It also shows prohibition , a massive part of this period in time , the banning of all alcohol.
