There's a person I've encountered who is always
very critical of other people. For example he criticizes
people for being vegetarian for ethical reasons, and
for health reasons, and criticizes the suggestion that
people try to deliberately contribute to decent lives
for livestock with their lifestyle. But, he can never
suggest a superior alternative to that of which he is
so critical. Is there a name for that type of disorder,
and/or someplace where people can learn more
about it?