In that thread someone says that Tao created his own lecture notes for a linear algebra course he was doing[1]. But that page is marked as coming from "2002", w

In that thread someone says that Tao created his own lecture notes for a linear algebra course he was doing[1]. But that page is marked as coming from "2002", which would make him 27. But surely Tao didn't first take linear algebra at 27?? Can anyone make sense of this for me? [1] https://news.ycombinator.com/item?id=2772019 https://news.ycombinator.com/item?id=2772019