I think Wretchard laid the crux of it down by quoting the slogans of Oceania from Orwell’s 1984 at the end of his post.

Remember what Winston Smith said? (I’m probably mangling the quote) “Freedom is the freedom to say that 2 + 2 = 4. From that all else follows . . .”

Sunstein’s contention seems to be that there can be no freedom unless the government can decree that 2 + 2 = 5, and you will actually believe it.
The truth, as it is defined by your rulers, is the only thing that can set you free.

All things considered, I tend to agree with the fictional Winston Smith rather than with Mr. Sunstein.

Too many people put an emotional connotation upon the concept of “government.” Actually its just something that a group of people ingests. It may be poisonous, neutral like sand, or actually something nutritious. And sometimes, that which they seek to ingest actually eats them, like when a sardine attempts to eat a shark.

But once its eaten, its in the body, for good or ill.

And with that tortured analogy, I shall end this rambling comment.