Attribution quarantine is a word a newsroom is willing to write in its own voice about one actor, and will only print inside someone else’s quotation marks about another. Each sentence on its own looks like careful practice: the outlet asserts what it can stand behind, and attributes what it can’t. The bias sits in the pattern. The same word, or the same fact, is owned in one direction and rented in the other, and the reader is never told why the standard changed. What stays inside the quotation marks reads as a claim. What the newsroom says unquoted reads as the world.

The test is symmetry. Find the hardest word in the piece and ask whether the outlet would write it unquoted if the roles were reversed. If not, the quotation marks are not doing attribution. They are doing the argument.