| Clue | Source | Date |
|---|---|---|
| "Brilliant idea," sarcastically | Universal | 12 Apr 2026 |
| "Who'd have thought?!" | ||
| "Who'd've thunk it?" | ||
| Sarcastic 'How come no one's thought of that before?' | USA Today | 12 Dec 2022 |
| *'Who'd've thunk it?' | Wall Street Journal | 18 Sep 2018 |
| *"Who'd've thunk it?" |