I am not at all sure it’s always true that posting nothing at all is easier than posting a short, snarky comment. The temptation to do the latter can be almost overwhelming.
True enough! That temptation falls away, however, if one simply stops reading.
As for the rest—in principle, you’re entirely correct. In practice, I do not think what you say is true. For one thing, as I mentioned, even in the extreme case where literally no one posts anything at all, there nonetheless remain plenty of ideas to examine. But even that aside, the problem is this: once you sweep aside those ideas which are just trolling, or explicitly known to be false, or have the Time Cube nature, you’re still left with a massive pile of what might be good but what could easily be (and likely is) total nonsense (as well as other possibilities like “good but ultimately not useful”, “subtly wrong”, etc.).
On the other hand, once you sweep aside those criticisms which are nothing but rudeness or abuse, or obvious trolling, etc., what you’re left with is… not much, actually. There really is a shortage of good criticism. How many of the posts on Less Wrong, within—say—the past six months, have received almost no really useful scrutiny? It’s not none!
Finally, as for this—
… your arguments for harsh criticism of top-level posts seem to me to have parallel arguments for harsh criticism of critical comments
As with so many things: one person’s modus tollens is another’s modus ponens.
True enough! That temptation falls away, however, if one simply stops reading.
As for the rest—in principle, you’re entirely correct. In practice, I do not think what you say is true. For one thing, as I mentioned, even in the extreme case where literally no one posts anything at all, there nonetheless remain plenty of ideas to examine. But even that aside, the problem is this: once you sweep aside those ideas which are just trolling, or explicitly known to be false, or have the Time Cube nature, you’re still left with a massive pile of what might be good but what could easily be (and likely is) total nonsense (as well as other possibilities like “good but ultimately not useful”, “subtly wrong”, etc.).
On the other hand, once you sweep aside those criticisms which are nothing but rudeness or abuse, or obvious trolling, etc., what you’re left with is… not much, actually. There really is a shortage of good criticism. How many of the posts on Less Wrong, within—say—the past six months, have received almost no really useful scrutiny? It’s not none!
Finally, as for this—
As with so many things: one person’s modus tollens is another’s modus ponens.