Wu on making claims about teaching and learning that are based on even a shred of research evidence
What i think he’s saying
Despite strong research evidence to the contrary, and despite the well-known historical trajectory of the development of the ideas that now comprise elementary school mathematics (including operations on both fractions and integers), the human mind is unfailingly logical.
Because all mathematical ideas can (post facto) be put into a logico-developmental framework, they must be. Anything else lacks rigor and misrepresents the nature of the field of mathematics.
These truths are self-evident. By definition, they do not require substantiation.