Institutio Oratoria

But since these witnesses are sometimes so artful that their first replies are designed to meet the wishes of the questioner, in order to win all the greater credit when subsequently they answer in a very different way, it will be the duty of the advocate to dismiss

In the case of advocates for the defence examination is in some respects easier, in some more difficult. It is more difficult because it is rarely possible for them to have any previous knowledge of what the witness is likely to say, and easier because, when they come to cross-examine, they know what he has already said.