@LouisIngenthron I'm not really going to argue with that, because it's pretty consistent with my views and practices. We'd just be arguing about what the phrase "marketplace of ideas" means.

I'll just say that the version that has not panned out is the idea that mere freedom of speech yields some kind effective meritocracy in which the best ideas thrive and the worst become marginal. If valuable sorting is possible, it would require institutions richer than mere absence of constraint.