| Answer | Crossword Clue |
|---|---|
| IAM | Descartes's "sum" |
| IAM | Descartes's "sum," translated |
| IAM | Descartes's conclusion |
| ERGO | Descartes's "therefore" |
| IDEE | Descartes's thought |
| IAM | Conclusion of Descartes's observation |
| ERGO | Part of Descartes's declaration |
| IDEE | It popped into Descartes's head |
| COGITOERGOSUM | Descartes's statement about pondering an addition problem? |
