- - He was famously rational
- - He fathered analytical geometry
- - French philosopher of "I think, therefore I am"
- - Philosopher's desperately sad secret
- - Frenchman who wrote "Je pense, donc je suis"
- - philoshoper, rene -
- - Philosopher and some things to mark his birthday?
- - Some travel guides in his language for philosopher
- - philosopher of the maps across the channel
- - 'Cogito ergo sum' philosopher
- - French thinker sadly desecrates Edward's departing
- - French philosopher and some things to mark his birthday?
- - Philosopher who contemptuously coined the term at 31 Down in its mathematical context
- - 'I think, therefore I am' thinker
- - "Cogito ergo sum" source
- - Cogito ergo sum man
- - Cartesians are his followers
- - Philosopher René
- - Great mathematician.
- - His motto: Cogito, ergo sum.
- - French philosopher
- - One showing some French skill in beginnings of "cogito ergo sum"?
- - Philosopher famous for his phrase 'I think, therefore I am'
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