A few more examples:
“Is this gluten-free?” (If we allow “gluten-free” we would allow “Every room is John-free.” and of course “Grass is edibility-free.” and very quickly Abs-E is trivial.)
Attempt: “This product contains rice flour, corn starch, tapioca flour, and salt.” but that just prompts the further question “Does any of those contain gluten?” …
Wittgenstein interrupted: “What can be said at all can be said clearly, and what we...”
“I think not all swans are white, and if we look for it we will find one that is not white.”
Attempt: “There exists a swan that is …” Blue? Green? Red? I can’t say “non-white”. I also can’t just list every color.
“I don’t believe in magic.”
I don’t even know how to start converting this to a positive statement.
Edit: I found it. It’s from Yurchak, Alexei. “Soviet hegemony of form: Everything was forever, until it was no more.” Comparative studies in society and history 45.3 (2003): 480-510.