| Clue | Source | Date |
|---|---|---|
| Must exist | Premier Sunday | 25 Aug 2024 |
| Is unavoidable | Newsday | 21 Oct 2023 |
| Surely is | The Washington Post | 12 Sep 2021 |
| Surely is | LA Times Daily | 12 Sep 2021 |
| "No question!" | Universal | 13 Aug 2021 |
| 'What other explanation is there?!' | New York Times | 29 Apr 2018 |
| "What other explanation is there?!" | ||
| Is undoubtedly | ||
| Is undoubtedly | ||
| Is inevitable |