“Cogito ergo sum, certamen ergo sum.”
“Cogito ergo sum. (I think, therefore I am.)”
“Dubito, ergo cogito, ergo sum.(English: "I doubt, therefore I think, therefore I am")”
“Cogito cogito ergo cogito sum -- "I think that I think, therefore I think that I am;" as close an approach to certainty as any philosopher has yet made.”
“I am not much for philosophy, but that old Descartes, he got me thinking. And therefore being. Anyone? Anyone? Cogito ergo sum jokes? No? Okay.”
“Cogito Ergo Lego”