| Clue | Source | Date |
|---|---|---|
| "I swear!" | LA Times Daily | 20 Dec 2023 |
| 'Totally serious' | USA Today | 28 Sep 2023 |
| Not a laughing matter | The Guardian Quick | 19 Aug 2023 |
| 'I'm dead serious' | New York Times | 30 Apr 2023 |
| "Seriously!" | LA Times Daily | 09 Nov 2022 |
| Serious | USA Today | 19 Sep 2021 |
| The serious matter of turning up on one liner | Irish Times Crosaire | 01 May 2021 |
| 'Seriously!' | New York Times | 01 Oct 2019 |
| "Seriously!" | ||
| 'Seriously!' | Wall Street Journal | 20 Aug 2016 |
| 'Scout's honor' | The Washington Post | 28 Feb 2016 |
| "For real" | ||
| "I kid you not!" | ||
| "Scout's honor" | ||
| "I'm serious!" | ||
| "This is for real!" | ||
| "This is for real!" | ||
| "I'm serious!" | ||
| "For realz" | ||
| "Seriously!" | ||
| "Seriously!" | ||
| "It's crazy but true!" | ||
| Hardly a trifling matter | ||
| "Really!" | ||
| "It's true!" | ||
| "It's true!" | ||
| "I'm serious!" | ||
| "Seriously!" | ||
| "I'm not kidding!" | ||
| "Swear to God!" |