Each of these three possible 'application'of philosophy to mathematics education represents a different focus, and might very well foreground different issues and problems.However, Figure 1,of course,raises more question than it answers. It illustrates that applications can be made either of philosophy or of two special branches of it. However what is such an application? The diagram might be taken to suggest that there are substantive bodies of knowledge and applicational activities connecting them, whereas philosophy, mathematics education and other domain of knowledge encompass processes of enquiry and practice, personal knowledge,and as well as published knowledge representations. They are not simply substantial entities in themselves, but complex relationships and interactions between persons, society, social,knowledge representations and communicative(and other) practices.