The Cognitive Reflection Test (CRT) is purported to test our inclination to overcome impulsive, intuitive thought with effortful, rational reflection. Research suggests that philosophers tend to perform better on this test than non-philosophers, and that men tend to perform better than women. Taken together, these findings could be interpreted as partially explaining the gender gap that exists in Philosophy: there are fewer women in Philosophy because women are less likely to possess the ideal ‘philosophical personality’. If this explanation for the gender gap in Philosophy is accepted, it might be seen to exonerate Philosophy departments of the need to put in place much-needed strategies for promoting gender diversity. This paper discusses...