W. D. Ross was a moral realist, a non-naturalist, and an intuitionist. The interpretation of negation is different in intuitionist logic than in classical logic. Heyting algebras in general are related to intuitionist logic. The British were largely divided into intuitionist and analytic camps. This work led Haidt to begin developing his social intuitionist approach to morality. For his undergraduate thesis he developed an intuitionist foundation for topology. Kleene and Vesley (1965) is the classic American introduction to intuitionist logic and mathematics. She also gives financial advice as an "intuitionist". He specialised initially in logic, publishing books on "Intuitionism" and "Intuitionist logic". They both offer a new aprioristic foundation, but different of the intuitionist. The protagonist is Lila Mae Watson, an elevator inspector of the "Intuitionist" school. Whitehead's "The Intuitionist" was nominated as the Common Novel at Rochester Institute of Technology (RIT). The Intuitionist is a 1999 speculative fiction novel by American writer Colson Whitehead. Social Intuitionist Model de-emphasized the role of reasoning in reaching moral conclusions. An intuitionist, for example, would not accept this argument without further support for that statement.