Sometimes when a dialogue gets boring, it’s useful to do this next writing technique, which is to reverse the argument. When reversing the argument in a dialogue, the smart one (Sagrado) answers the questions from the dumb one (Simplicio) with questions of his own. Then Simplicio has to explain his ideas in greater detail. This helps Sagrado win the argument more clearly and completely, because Simplicio sees the flaws in his own thinking.
It’s a useful debate technique, and a useful technique in writing dialogues.