In the domain of philosophy of language, Michel Seymour holds an institutional and communitarian conception of language inspired in part from the thought of Ludwig Wittgenstein which he opposes to the idealism of Gottlob Frege, to the inneism of Noam Chomsky and to the psychologism of John Searle.

[1] According to Seymour, speaking a language is a rule-governed activity, where the rules express the social conditions of expression-use.

[2] Accordingly, Seymour endorses a semantics based on assertability conditions inspired from Saul Kripke which ties the meaning of expressions to their conventional usage.

[3] In the domain of political philosophy, Seymour starts from John Rawls's Political Liberalism to defend a conception of collective rights equal in validity and importance to individual rights, a position which notably runs counter to that of Will Kymlicka on the subject.

This would allow state employees to wear religious symbols, unless they occupy high-authority positions (President, Supreme Court Justice, etc).