Postby tony2 » Sun Mar 08, 2015 1:12 am
This has been knocked about since the mid 1600s. From Winkipedia:
Cogito ergo sum[a] (/ˈkoʊɡɨtoʊ ˈɜrɡoʊ ˈsʊm/, also /ˈkɒɡɨtoʊ/, /ˈsʌm/; Classical Latin: [ˈkoːɡitoː ˈɛrɡoː ˈsʊm], "I think, therefore I am", or better "I am thinking, therefore I exist") is a philosophical proposition by René Descartes. The simple meaning of the Latin phrase is that thinking about one’s existence proves—in and of itself—that an "I" exists to do the thinking; or, as Descartes explains, "[W]e cannot doubt of our existence while we doubt … ."
This proposition became a fundamental element of Western philosophy, as it was perceived to form a foundation for all knowledge. While other knowledge could be a figment of imagination, deception or mistake, the very act of doubting one's own existence arguably serves as proof of the reality of one's own existence, or at least of one's thought.
I've alluded to it a few times on this site, so now I give you the "horse's mouth".
Remember, if you doubt, you exist. If you don't, none of us exist --- you're just having another one of those dreams again.....