Inconsistent documentation: are interned strings immortal or not?

Documentation

From HOWTO about python free-threading:

As of the 3.14 release, immortalization is limited to:

• Code constants: numeric literals, string literals, and tuple literals composed of other constants.
• Strings interned by sys.intern().

From sys.intern():

Interned strings are not immortal; you must keep a reference to the return value of intern() around to benefit from it.

So, are the interned strings immortal or not?

Linked PRs

• gh-144176

先比較 free-threading HOWTO 中關於 immortalization 的部分與 sys.intern() 文件及連結的 PR gh-144176。檢查哪項陳述反映了文件記載的行為，接著更新相互衝突的文件，使兩個部分保持一致，並確認呈現後的措辭。