| 100% | ERGO | 4 | "Cogito, ___ sum" ("I think, therefore I am") |
| 96% | ERGO | 4 | "Cogito, ___ sum" ("I think, therefore I am," to Descartes) |
| 82% | SUM | 3 | "Cogito, ergo ___" ("I think, therefore I am") |
| 72% | RENEDESCARTES | 13 | "I think, therefore I am" |
| 72% | DESCARTES | 9 | I think, therefore I am |
| 71% | RENE | 4 | "I think, therefore I am" philosopher Descartes |
| 69% | RENE | 4 | Descartes, who said, "I think, therefore I am" |
| 69% | RENE | 4 | Descartes who postulated, "I think, therefore I am" |
| 69% | RENE | 4 | Descartes who said "I think, therefore I am" |
| 69% | DESCARTES | 9 | Philosopher who said "I think, therefore I am" |
| 69% | DESCARTES | 9 | Frenchman who wrote "I think, therefore I am" |
| 69% | RENE | 4 | Descartes who said, "I think, therefore I am" |
| 55% | AM | 2 | "I think, therefore I —" |
| 54% | COGITOERGOSUMO | 14 | "I think, therefore I wrestle"? |
| 52% | IRANT | 5 | Dennis Miller book "___, Therefore I Am" |
| 50% | SILLYME | 7 | "What was I thinking?" |
| 50% | DOH | 3 | "What was I thinking?!" |
| 50% | SILLYME | 7 | "Whatever was I thinking?" |
| 50% | OHSAY | 5 | “Hey, I was thinking ...” |
| 50% | DOH | 3 | “What was I thinking?” |
| 50% | STUPIDME | 8 | "What was I thinking?!" |
| 50% | DOH | 3 | "What was I thinking!?" |
| 49% | NOTAGAIN | 8 | "Ugh, I thought last time was the last time" |
| 49% | IMO | 3 | "What I think is...": Abbr. |
| 49% | SILLYME | 7 | "Gosh, what was I thinking?!" |
| 48% | CAPS | 4 | "UH-OH, I THINK MY ___ LOCK IS ON!" |
| 48% | DAREME | 6 | "You don't think I will?!" |
| 48% | IMO | 3 | "What I think is ...," in texts |
| 48% | IMHO | 4 | "This is what I think," online |
| 48% | DAREME | 6 | "You don't think I will?" |