But new theories may already have been suggested, of which the practitioner is unaware. There is inevitably a gap, between the first presentation of a new theory and its reception by the practitioner, which is not only a gap in time (ideas take time to diffuse), but also in comprehension (academics tend to speak to one another in special language that is accessible to the non-specialist) It may be that some of the assumptions about the world that a practitioner more-or-less unconsciously holds (perhaps, about human perception, about what 'authority' is, about the relationship of price and supply, which if it were known to the practitioner might significantly alter his own understanding of his decision situation and the choices open to him