But he actually wrote [Update] “Dubito ergo cogito; cogito ergo sum” (“I doubt, therefore I think; I think therefore I am”)
That adds a twist to what I understood Descartes was saying. The author Martha Beck [of the original article, now off-line] goes on to recommend:
– Embrace uncertainty. There is no absolute truth.
– Test every idea
– Ask if it unites or divides
(see my post Do Be Do)
[addendum – see comments]