Institutio Oratoria

We may at times produce the effect of a proposition, even though it is not in itself a proposition, by adding after the statement of facts some phrase such as the following:

These are the points on which you will give your decision,

thereby reminding the judge to give special attention to the question and giving him a fillip to emphasise the point that we have finished the statement of facts and are beginning the proof, so that when we start to verify our statements he may realise that he has reached a fresh stage where he must begin to listen with renewed attention.