Meaning: “that” is authentic or reliable. Use examples.
Rewrite 1: you could swear testimony on it
Rewrite 2: it’s as authentic as a dollar bill
Rewrite 3: it’s as trustworthy as a nun under oath
Rewrite 4: you can trade that on the stock market

Comment: The difficulty in rewriting this suggests that the number of unquestionable institutions is limited.

More reading about clichés
What I found when I googled “clichés”:
• Jonah Goldberg’s File on National Review: “Remembering the Obvious Clichés of War.”

Note: By providing links to other websites I am only showing you what is out there about clichés – I am not endorsing any content or opinion expressed there.

Check out the searchable alphabetical list of all my cliché rewrites available in the archive list at the right.