6 ms·23? Ha! No. I went back to school at 34 and got my PhD in pure math from Princeton when I was 40.by cottonseed 8y ago23? Ha! No. I went back to school at 34 and got my PhD in pure math from Princeton when I was 40.psyklic 8y agoRaymond Smullyan also got his mathematics PhD from Princeton at 40.usgroup 8y agoSimilarly. People fear lack of precedent or parting with convention much more than justified.