The term "rational" and its variants (rationality, rationalism) are used in a lot of contexts in economic debate, both positively and negatively, but nearly always sloppily or dishonestly. A specimen I've seen on more occasions than I can count is the line (usually presented with a sense of witty originality) "if you are opposed to economic rationalism, you must be in favor of economic irrationalism"... I've come to the conclusion that the word "rational" has no meaning that cannot better be conveyed by some alternative term and that the best advice is probably to avoid it altogether.