  Most commentators have let the descriptive component of Maddy's naturalism, the autonomy thesis, pass, focusing criticism instead on its normative implications. Yet the autonomy thesis is very radical. The usual picture of the interaction between mathematics and philosophy is of a two-way street. In particular, it is usually thought that philosophy impinges to some degree on mathematical practice. Intuitionists for example take the dependence to be profound: they think that all of mathematical practice rests on a false philosophical foundation and that once that foundation is removed, mathematics totters.