| Clue | Source | Date |
|---|---|---|
| "... assuming one exists" | Universal | 01 Oct 2023 |
| "Unless there are none" | LA Times Daily | 19 Feb 2023 |
| "... though there may not even be one" | Universal | 19 Jan 2023 |
| "Assuming there is one" | LA Times Daily | 27 Sep 2022 |
| '. . . should there be one' | USA Today | 19 Aug 2022 |
| '. . . though there may be none' | USA Today | 31 May 2020 |
| Should there be one | The Washington Post Sunday | 22 Sep 2019 |
| Should one apply | The Washington Post Sunday | 10 Mar 2019 |
| Phrase expressing some doubt. |