Ontology Warning: You are not logged in. Your IP address will be publicly visible if you make any edits. If you log in or create an account, your edits will be attributed to your username, along with other benefits.Anti-spam check. Do not fill this in! === Ontological and epistemological certainty === [[RenΓ© Descartes]], with ''[[cogito, ergo sum]]'' (''je pense donc je suis'': "I think, therefore I am"), argued that a person's thinking agency, their ''res cogitans'' β as distinct from their material body, their ''res extensa'' β is something that we can know exists with [[epistemology|epistemological]] certainty. Descartes argued further that this knowledge could lead to a proof of the certainty of the [[existence of God]], using the [[ontological argument]] that had been formulated first by [[Anselm of Canterbury]].<ref>{{Cite web|url=https://www.iep.utm.edu/ont-arg/|title=Anselm: Ontological Argument for God's Existence.|website=IEP}}</ref> Summary: Please note that all contributions to Christianpedia may be edited, altered, or removed by other contributors. If you do not want your writing to be edited mercilessly, then do not submit it here. You are also promising us that you wrote this yourself, or copied it from a public domain or similar free resource (see Christianpedia:Copyrights for details). Do not submit copyrighted work without permission! Cancel Editing help (opens in new window) Discuss this page