You are right that it does not generalize: but in this particular case, it was really reflective of the article which was shallow itself (IMO at least). So I g

You are right that it does not generalize: but in this particular case, it was really reflective of the article which was shallow itself (IMO at least). So I guess that the rule doesn't generalize either, but I can at least understand the reasoning behind it and accept that it might work better on average — thanks for the explanation!