Elaborate: If he can't refute the other side, Mill continued in On Liberty, he hasn't grounds for his position, and if he hasn't understood why another would think differently, he doesn't truly understand his own view.
Show the relevance: Not everyone likes Byrd as much as I seem to, an opinion you may know from such blog posts as yesterday's (of which this is an update), and they have good reasons which I must face. For a hard hitting case towards that end, (though also a quite flattering reference to yours truly) see Jere's as always on-the-ball blog.
And in case you're into "evidence" culled from "objective reality" (weirdo), here are some statistical measurements:
Byrd: 98 ERA+, 101 with the Sox, 1.31 whip. With the Sox, 4.74 K/9, 1 HR and 1 BB per 4.75 IP, .792 opponents OPS overall, .826 with the Sox.
Wakefield: 109 ERA+, 1.21 whip, 1 HR per 6.8 IP, 2.9 BB/9, 5.72 K/9, and only .699 opponents OPS.
My ideological preference for finesse pitchers can blind me to the facts on the ground, making me a hawk for Byrd. But I can see the other side. As long as it's not because Byrd's tipping his hand, I'm ok with that.
* This blog post contains almost 50% recycled material. Go green!