Full Idea
Conceptualists claim that we have basic a priori knowledge of mathematical axioms in virtue of our possession of mathematical concepts.
Gist of Idea
Conceptualists say we know mathematics a priori by possessing mathematical concepts
Source
Philip Kitcher (The Nature of Mathematical Knowledge [1984], 04.1)
Book Reference
Kitcher,Philip: 'The Nature of Mathematical Knowledge' [OUP 1984], p.65
A Reaction
I sympathise with this view. If concepts are reasonably clear, they will relate to one another in certain ways. How could they not? And how else would you work out those relations other than by thinking about them?