| Clue | Source | Date |
|---|---|---|
| Confident in | ||
| Not doubting at all | New York Times | 19 Apr 2019 |
| Not doubting at all | ||
| Having no doubt about | New York Times | 17 Apr 2017 |
| Having no doubt about | ||
| Having no reservations about | ||
| Not doubting | ||
| Certain about | ||
| Certain about | ||
| Certain about | ||
| Certain about | ||
| Certain about | ||
| Certain about | ||
| Positive | ||
| Without a doubt about | ||
| Certain about | ||
| Certain about |