It is testament to the sad state of contemporary logical thought that this fallacy is still accepted. It acceptance has a lot to do with why few economists study any philosophy or the history of economic thought and almost none who do are able to get out of the modern paradigm. Empirically, the first Mr. He got his ticket along with a lot of other chaps because of Professor Smith's economics. Mr Dickens was really doing positive economics when he studied the distribution problem in Oliver Twist and other works.
Methodology is the key.
Garrick Small Comments on this issues are welcome.