<bq author="Murray Rothbard">It is no crime to be ignorant of economics, which is, after all, a specialized discipline and one that most people consider to be a 'dismal science.' But it is totally irresponsible to have a loud and vociferous opinion on economic subjects while remaining in this state of ignorance.</bq> <hr> <n>Now replace the word "economics" with any other discipline and you have yourself a pretty good rule-of-thumb.</n>