Editing Cogito, ergo sum (section)

=== Punctuation ===
Descartes wrote this phrase as such only once, in the posthumously published lesser-known work noted above, ''[[The Search for Truth by Natural Light]]''.<ref name="AT" /> It appeared there mid-sentence, uncapitalized, and with a comma. (Commas were not used in [[Classical Latin]]{{Efn|See ''Latin Punctuation in the Classical Age''.<ref>{{Cite web|title=Latin Punctuation in the Classical Age {{!}} Otha E. Wingo, E. Otha Wingo {{!}} download|url=https://u1lib.org/book/2832553/98631c|url-status=live|access-date=2021-12-25|website=u1lib.org|page=16|archive-url=https://web.archive.org/web/20211225053605/https://u1lib.org/book/2832553/98631c |archive-date=2021-12-25 }}</ref>}} but were a regular feature of scholastic Latin,<ref>{{Cite book|last=Saenger|first=Paul|url=https://books.google.com/books?id=w3vZaFoaa3EC&pg=PA1|title=Space Between Words: The Origins of Silent Reading|date=1997|publisher=Stanford University Press|isbn=978-0-8047-4016-6|pages=20|language=en}}</ref> the Latin Descartes "had learned in a Jesuit college at La Flèche."<ref>{{cite book|first=Desmond M. |last= Clarke|chapter=Descartes' Biography as a Guide to His ''Meditations''|editor=Allen Speight|title=Narrative, Philosophy and Life|publisher=Springer|date=2015|isbn=978-94-017-9348-3|pages=177|url=https://books.google.com/books?id=_I-aBQAAQBAJ&q=%22the+only+Latin%22}}</ref>) Most modern reference works show it with a comma, but it is often presented without a comma in academic work and in popular usage. In Descartes's [[Principles of Philosophy|''Principia Philosophiae'']], the proposition appears as '''''ego cogito, ergo sum'''''.<ref name="Descartes1644">{{cite book|author=Descartes, René|url=https://archive.org/details/ita-bnc-mag-00001403-001|title=Principia Philosophiae|publisher=apud Ludovicum Elzevirium|year=1644|pages=[https://archive.org/details/ita-bnc-mag-00001403-001/page/n68 30], 31|quote="Ego Cogito ergo sum".}}</ref>