> For the complete documentation index, see [llms.txt](https://accs.mikesay.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://accs.mikesay.com/part5/chapter18/all-data-is-useful-maybe-not.md).

# 所有数据是有用的，也许不是