| Clue | Source | Date |
|---|---|---|
| Sure to succeed | Eugene Sheffer | 23 May 2023 |
| '100% guaranteed!' | Wall Street Journal | 11 Feb 2023 |
| Guaranteed to succeed | Eugene Sheffer | 13 Sep 2019 |
| Guaranteed-to-fly | New York Times | 08 Apr 2017 |
| Guaranteed-to-fly | ||
| Is guaranteed to work | ||
| Is guaranteed to work | ||
| Guaranteed to work |