1. In three subjects which you might choose for an argument show where
the burden of proof would lie.

2. In the case of one of these arguments show how the burden of proof
might change with the argument.

17. The Brief. When you have settled these preliminary questions of
the audience you wish to win over to your view, and of the way their
prepossessions and knowledge of the subject will affect your
responsibilities for the burden of proof, you are ready to begin work on
the brief, as the plan for an argument is called. This brief it is
better to think of as a statement of the logical framework of the
argument, which you are constructing for the purpose of clearing up your
own mind on the subject, and especially to help you to see how you can
most effectively arrange your material. It differs from the usual brief
in a case at law in that the latter is ordinarily a series of compact
statements of legal principles, each supported by a list of cases
already decided which bear on that principle. The brief you will be
making now will consist of an _introduction_, which states whatever
facts and principles are necessary to an understanding of the brief, and
the _brief_ itself, which consists of a series of propositions, each
supporting your main contention, and each in turn supported by others,
which again may each be supported by another series. Such an analysis
will thoroughly display the processes of your reasoning, and enable you
to criticize them step by step for soundness and coerciveness.

I shall first explain the several steps which go to the making of the
introduction to the brief; and then come to the making of the brief