"Please don't post shallow dismissals, especially of other people's work. A good critical comment teaches us something."

https://news.ycombinator.com/newsguidelines.html

p.s. Especially please don't do this when a thread is brand new. Such comments are the easiest to post, and therefore the quickest to appear, but by posting them, you steer the discussion straight away from the curious, thoughtful conversation we want here. Threads are extremely sensitive to initial conditions, so this is important.