Institutio Oratoria

It is also possible to treat the subject in such a way as to give it an air of credibility, as is done in comedy and farce. For some things have such natural sequence and coherence that, if only the first portion of your statement is satisfactory, the judge will himself anticipate what you have got to say in the later part.

It will also be useful to scatter some hints of our proofs here and there, but in such a way that it is never forgotten that we are making a statement of facts and not a proof. Sometimes, however, we must also support our assertions by a certain amount of argument, though this must be short and simple: for instance in a case of poisoning we shall say,

He was perfectly well when he drank, he fell suddenly to the ground, and blackness and swelling of the body immediately supervened.