25.
The poet said, "Are these hard truths?"
The mathematician said, "Very hard."
The poet said, "Tell me an easier one."
The mathematician said, "The geodesic flow on a compact, negatively curved manifold is ergodic."
The poet considered for a moment. "There are some beautiful words in that truth. They would make good poetry. But it isn't an easy enough truth for me."
The mathematician looked frustrated. "This may take a while."