Example image of eyePlorer eyePlorer map for 'Crispin Wright': Cognitivism Gottlob Frege Knowledge Ludwig Wittgenstein Objectivity (philosophy) Philosophical realism Philosophy Philosophy of mathematics Skepticism Truth United Kingdom Birkenhead School All Souls College, Oxford University of St Andrews New York University Columbia University Princeton University University of Oxford Arché (research center) Formal system Logicism Arithmetic Hume's principle Second-order logic Argument Consistency David Hume Peano axioms Principle Frege's theorem George Boolos Mathematical proof Bob Hale (philosopher) Cambridge, Massachusetts Massachusetts Identity (social science) Sentence (linguistics) Morality Stipulative definition Discourse Theory of justification Harvard University Press British Academy Fulbright Program Leverhulme Trust Oxford Royal Society of Edinburgh Timothy Chambers Wright Neil Tennant (philosopher)