The opposite is also true: to get fewer, higher quality replies, say more. Even if people do respond with low quality responses, it's easier to filter them out

The opposite is also true: to get fewer, higher quality replies, say more. Even if people do respond with low quality responses, it's easier to filter them out because they say things that make no sense if they read the entirety of what they are responding to. Long-form articles posted to HN are a great example.