Abstract
This paper attempts a philosophical basis for ethnomathematics by explaining
how it develops, how it is, legitimised, and how it is integrated within other
mathematical cultures. Ethnomathematics requires a relativistic philosophy.
Questioning universal notions in mathematics can be traced back to the French
philosopher Gaston Bachelard. He describes an historically relative notion of
objectivity which gives rise to changing conceptions of mathematical objects and
of rationality. This analysis provides a parallel which is used to explain cultural
relativity, not just in mathematical practices, but also for rational thought. The
history of navigation is used to illustrate such relativity. The possibility that
ethnomathematics exists at the level of rational thought raises important
questions in education. Questions about the practice of mathematics education,
and about its socio-political function, are discussed.
BILL BARTON
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