3.  Explain to (a) the initiate, (b) the uninitiate some piece of mechanism, or some phase of a human activity or interest, which you know at first hand and regarding which technical (or at least not generally understood) terms are employed. (The exact subject depends, of course, upon your own observation or experience; you are sure to be familiar with something that most people know hazily, if at all.  Bank clerk, chess player, bridge player, stenographer, journalist, truck driver, backwoods-man, mechanic—­all have special knowledge of one kind or another and can use the particular terms it calls for.)

4.  Explain to (a) a supporter of the winning team, (b) a supporter of the losing team why the baseball game came out as it did.

5.  Discuss before (a) a Democratic, (b) a Republican audience your reasons for voting the Democratic (Republican) ticket in the coming election.

6.  Explain to (a) your own family, (b) the man who can lend you the money, why you wish to mortgage your house (any piece of property).

7.  Explain to the owner of an ill-conducted business why he should sell it, and to a shrewd business man why he should buy it.

8.  Discuss before (a) old men, (b) young men, (c) women the desirability of men’s giving up their seats in street cars to women. (Also modify the question by requiring only young men to give up their seats, and then only to old people of either sex, to sick people, or to people with children in their arms.)

9.  Explain the necessity of restricting immigration to (a) prospective immigrants, (b) immigrants just granted admission to the country, (c) persons just refused admission, (d) exploiters of cheap labor, (e) ordinary citizens.

10.  Discuss the taking out of a life insurance policy with (a) a man not interested, (b) a man interested but uncertain what a policy is like, (c) a man interested and informed but doubtful whether he can spare the money, (d) the man’s wife (his prospective beneficiary), whose desires will have weight with him.

11.  Discuss the necessity of a reduction in wages with (a) unscrupulous employers, (b) kind-hearted employers, (c) the employees.

12.  Advocate higher public school taxes before (a) men with children, (b) men without children.

13.  Advocate a further regulation of the speed of automobiles before (a) automobile-owners, (b) non-owners.

14.  Urge advocacy of some reform upon (a) a clergyman, (b) a candidate for office.

15.  Combat before (a) advertisers, (b) a public audience, (c) a lawmaking body, the defacement of landscapes by advertising billboards.

16.  Describe life in the slums before (a) a rural audience, (b) charitable persons, (c) rich people in the cities who know little of conditions among the poor.

17.  Describe the typical evening of a spendthrift in a city to (a) a poor man, (b) a miser, (c) the spendthrift’s mother, (d) his employer, (e) a detective who suspects him of theft.