- From: Mayank via GitHub <sysbot+gh@w3.org>
 - Date: Sat, 12 Oct 2024 17:07:09 +0000
 - To: public-css-archive@w3.org
 
A small consideration that may have been missed: In HTML/JS, `indeterminate` and `checked` states are _not_ mutually exclusive; which means `:indeterminate` can be made to match together with both `:checked` and `:not(:checked)`. It may not be very useful, but you can have "indeterminate checked checkbox" and "indeterminate unchecked checkbox".
<details><summary>You can verify it in the browser console</summary>
```js
const checkbox = document.createElement("input");
checkbox.type = "checkbox";
checkbox.checked = true;
checkbox.indeterminate = true;
checkbox.matches(":checked"); // true
checkbox.matches(":indeterminate"); // true
```
</details> 
If `:unchecked` is made mutually exclusive with `:indeterminate`, it would make things inconsistent.
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