From a higher vantage point, the ultimate reference still is from Descartes in Discourse on the Method of Rightly Conducting One's Reason and of Seeking Truth i

From a higher vantage point, the ultimate reference still is from Descartes in Discourse on the Method of Rightly Conducting One's Reason and of Seeking Truth in the Sciences, esp. Part II [0] https://en.m.wikipedia.org/wiki/Discourse_on_the_Method https://en.m.wikipedia.org/wiki/Discourse_on_the_Method