Enough, Already

A few days ago Matthew Yglesias, in a burst of integrity, admitted that he knew nothing about pedagogy. 
Today, however, when commenting on Detroit's disastrous school cutbacks, he confidently asserts that

[t]he city really should be operating fewer school buildings, and though large class sizes aren’t ideal it’s more important for kids to have access to effective teachers than for kids to have low student:teacher ratios.

So, it seems, that despite not knowing anything about how to teach, he knows enough to know that fewer teachers overwhelmed by larger and ever larger classroom size will be effective because dealing with a large number of often unruly students isn't exhausting; not a bit of it, its exhilarating.

Once you admit that you know nothing about something it's time to shut the door on commenting on the thing about which you know nothing.  In this case the farcical nature of his contribution serves to buttress his admission of ignorance.