Etymology: Middle English, from Late Latin commentum
1. a note explaining, illustrating, or criticizing the meaning of a writing
2. an observation or remark expressing an opinion or attitude
3. a judgment expressed indirectly
Please note that the comment function of this blog is intended to provide an opportunity for folks with something to say that fits into one-of-the-above categories and is related in at least a tangential way to the article being commented upon.
Other people's articles, blogs, essays, scientific studies, etc. are better suited to posting on your own blog for people so inclined to comment upon. (Check it out on the blogger home page ... it really couldn't be simpler!)