I should have used the full sentence. Why does it stop being "notation as a tool of thought" See comments like this one https://news.ycombinator.com/item?id=20

I should have used the full sentence. Why does it stop being "notation as a tool of thought" See comments like this one https://news.ycombinator.com/item?id=20732924 https://news.ycombinator.com/item?id=20732924