He was famously rational

Usage examples of descartes.

When she first boarded, as the newly hired doctor for the Descartes Mining Platform Number 6, the sound drove her halfway to distraction.

Enoch tried yet another tack: “I have in my saddlebags a copy of Principia Philosophica, the last thing Descartes wrote before he died.

And this, combined with the new method of analysis of Descartes, gives us a way to describe Creation and perhaps to predict the future.

That only worked if there was a language, or at least an alphabet, that had the power of expressing shapes without literally depicting them, a problem that Monsieur Descartes had lately solved by (first) conceiving of curves, lines, et cetera, as being collections of individual points and (then) devising a way to express a point by giving its coordinates—two numbers, or letters representing numbers, or (best of all) algebraic expressions that could in principle be evaluated to generate numbers.

He has to translate it back into the sort of language that Descartes would have used.

If that rope were stretched tight it would be akin to one of the numbered lines employed by Monsieur Descartes in his Geometry.

This from men who’d personally known Descartes and Fermat and who considered exaggeration an unspeakably vulgar habit.

And it also contains certain unpublished manuscripts of Descartes and Pascal.

I sit there in Colbert’s house trying to understand Descartes, working the mathematical proofs that Huygens, my tutor, gives me, and looking out the windows as the street fills up with porters staggering under their back-loads of gold and silver, converging on a few doorways.

I tried to cover my embarrassment by ranting to the children about Descartes and Euclid.

Until Descartes, everyone supposed that such truths were few in number, and that Euclid and the other ancients had found almost all of them.

But when Descartes began his project, we all got into the habit of mapping things into a space that could be described by numbers.

Whether her fellow employees knew it or not, one of the chief reasons that the Descartes Mining Corporation had so few duels and mutinies on delivery runs was due to the peace-inducing hum of the engines.

After much negotiation, Lunzie signed on with Descartes for a stint on a remote mining platform.

Fiona had been angry that she couldn't accompany her mother to the Descartes Platform, and had refused to accept the fact.