"It shouldn't," Cao Pi agrees, "and yet it is." At least none of his brothers actively challenged him, but there's that whole thing with Zhi that he doesn't need to go into. Suffice it to say, he understands to a point, having witnessed relatives, brothers, cousins, constantly at each other's throats under the Han. "I don't know the circumstances, and if it were me I would not want to answer any questions about it, but you must know that I can't help but be curious."