system
Given the following post, respond as if you're commenting on Reddit:
human
Could "Cogito Ergo Sum" be false?

Hello! I am Alex, A 16 year old boy who has been tinkering with the ideas of Rene Descartes' "Cogito Ergo Sum" "I think there fore I am" for a while now and have come to realise something about it.  

I confess I have not read his particular book "Meditations on First Philosophy" where this quote originates to my knowledge. I will probably in the near future read it but I have studied online about the quote itself and the meaning of it. I have a particular question in mind that has plagued me for months now, which I wish to address first before dwelling deeper into Rene Descartes' philosophical studies. 

Descartes questions and doubts that can he be sure of any beliefs of his to "exist" or to be "real" and that what if a demon could be deceiving all of his beliefs and thoughts to be "wrong" or that he could never be sure of them. He begins the disproving of the demon by removing all of his beliefs he has off the table of certainty out of the question to find are any of them out of the demons grasp of influence as they could be of the demons tampering. He "proves" the existence of doubt. As he had stated: if you are doubting that you are doubting, you must be doubting then! But my question on this matter is, how can descartes be absolutely sure, doubting do you doubt proves there is doubt? People might say it is self evident, but what if the demon is tampering that doubting doubt equals doubt and descartes has been deceived by the demon to come to this conclusion? What if doubting doubt equals something else than doubt but the demon is hiding the fact it is? Does Rene Descartes own "demon belief system" prove his findings false itself and the idea of "I think therefore I am" false therefore?  -Alex


:EDIT: This idea of "doubting doubt equals doubt means it exists absolutely" led me to read about logical axioms also, as an example of the axiom "X = X" is an "absolute truth" or axiom but how can one be even sure X equals itself? Isn't it just a mere "belief" in the end ? And nothing really has been proven? Is all we merely "perceive" just belief? A whirlpool of infinite doubt as we doubt until we doubt for infinity and doubt isn't even the concept of belief a belief and so on and so on.
gpt
Hume famously offered a way to doubt this. The term "I" in the phrase is something that is being assumed, not something we actually observe. Hume says that there's no reason to think such thing as this "I" exists - all we have is a series of impressions, related to each other via similarity. We have no cause to believe there there is some sort of "self" having the impressions that is unified into an "I."