However there is a missing element from philosophy of mathematics education that a broader interpretation brings into play, namely that of philosophy. The metonymic structure of the term 'philosophy of mathematics education' brings 'philosophy' and 'mathematics' together, foregrounding the philosophy of mathematics. The philosophy of mathematics is undoubtedly an important aspect of philosophy of mathematics education, especially in the way that the philosophy of mathematics impacts on mathematics education. This is part of the missing element.