> I have read this sentence four times and I have no idea what it means.
I'm motivated to make an effort to comment when I think I can contribute something to the discussion in accordance to the HN guidelines.
> which often occurs when the trend of the discussion is perceived to possibly be leading down a false or unoptimal path...an unorthodox view
I'm motivated to express views that I perceive to be valid/true/truthful when I have not seen these topics addressed. This means the expressed perspective is often unorthodox, since the orthodox perspective has already been addressed. These expressions are not always unorthodox, but I intuit that they are often more unorthodox than the norm.
My intention is to aid "intellectual curiosity" by expanding the breadth & depth of the discussion.