Was he wrong? I don't think so. Maybe I will never know for sure the exact nature of my being, but I know this much: I am something, or else I would not be able to question it.
That would be a great conversation in and of itself.
But here are my thoughts of "I think therefore I am" (Cogito ergo sum for you Latin nuts)
It is, when not heavily scrutinized, a tautology or a simple logical truth, but it is really just a well disguised syllogism.
P1: I think.
P2: Whatever has the property of thinking exists.
A :Therefore I exist.
There is a major problem in the second premise of 'Whatever has the property of thinking exists'. If one is doubtful of existence, one would throw out that premise in its entirety. The simple way around this is to suggest that one cannot be mistaken about one's own existence. If you are mistaken about whether you exist, you do not exist and therefore could not have made the mistake about your existence. So we may as well assume we do exist. But this argument is fallacious, it basically states that doubting existence is absurd, therefore you must believe in existence.
The far bigger problem however, is the 'I'.
The argument has shifted from a personal view to an objective third person view with no justification. The person making the argument does not know if they themselves are thinking. They know that thought is occurring and simply accepted that it is theirs. So there is another groundless premise
True, you are absolutely correct. I meant that I could prove to myself that he was real. Whether someone else believes their own existence is not my concern.
Really? How can you
prove his existence to yourself?
You can't prove your own existence to yourself satisfactorily, as Cogito Ergo Sum can have holes poked in it.
But enough about that particular ramble of mine.
I am assuming you mean his consciousness or 'self'. Proving his physical existence is quite dull.
Again, you are a observing a totally subjective reality which seems to have an objective layer underneath it. In order to prove that he exists in a state similar to what you possess, you must first perceive under through his observational standpoint. You can't satisfactorily prove anything exists.
The only way to verify a fact is to perceive its existence. When you question perception, facts become useless because no fact can ever be proven. At that point, what is there to argue?
True, doubting existence is an absurd argument, but that does not automatically make it an invalid one.
And the existence of facts is yet another great topic.
To sum my views on facts, a fact is physically infeasible and therefore a useless concept in its purest form. A fact should not be considered an absolute truth, but one based off of evidence.
Am I mistaken to think that nonsensical and illogical are the same thing? It is illogical to believe something for which I have no evidence.
Yes.
Logic does not have to adhere to reality, although it often does. Basically, logic is a formalized set of rules for our common sense.
In logic, you must establish premises. These premises can be anything you want
P: Yellow is a color
P2: All colors formed from the mucus of a giant nose
A: Yellow is mucus formed from a giant nose.
This argument is clearly absurd, idiotic, garbage. But it is perfectly logical.
Common sense operates on a variety of premises. It is important to make that distinction. Anything can be logical in the right context, and illogical in the wrong context. There is a post in the "How can anybody believe in god?" thread which highlights that quite nicely.