| Solution | Length | |
|---|---|---|
| 5 letters | ||
| proof | 5 | |
| ratio | 5 | |
| 6 letters | ||
| smarts | 6 | |
| reason | 6 | |
| psyche | 6 | |
| 9 letters | ||
| sophistry | 9 | |
| reasoning | 9 | |
| 11 letters | ||
| rationalism | 11 | |
| RATIONALITY | 11 | |
| 13 letters | ||
| understanding | 13 | |
| ratiocination | 13 | |
| 15 letters | ||
| rationalization | 15 | |
| 18 letters | ||
| specious reasoning | 18 | |