# How to prove existence?

by Jackalope
Tags: existence, prove
 P: 5 Hey my smart *** English teacher is always asking us to try and prove our existence to him....... When someone tries to say "Well you can see me can't you?" He'll reply "Have your eyes never deceived you before? Is that lake in the middle of the desert that always moves away from you when you get close to it real?" When you try to say "Well you can feel me...." He has another smart *** remark :P You go through all the senses and he manages to come up with an excuse for all of them.... So I was thinking, "Hmmmmm if I could prove my existence to this guy it would put me on his good side and most likely make the class easier for me...." So now I leave you with my question, is there any way to prove existence?
 P: 25 The next time he does this ask him to define the word existence or ask what does it mean to exist in the first place?
P: 5
 Quote by ronjanec The next time he does this ask him to define the word existence or ask what does it mean to exist in the first place?
Ooo that's good dude! Thanks. I'll see how that one goes over on him :P Thanks for the quick reply :D

 Math Emeritus Sci Advisor Thanks PF Gold P: 39,682 How to prove existence? I know I exist. Since you are the one I am not sure of, I see no point in trying to prove to you that I exist!
 P: 5 No somebody has tried that remark but it just isn't witty enough.... You know what I mean?
 P: 465 Jackalope, let me convince you that I exist. But let me first confirm this: are you asking ME if I exist? If not then fine, I don't need to prove anything to you and we are done. But if yes then since you are deliberately asking me something then you already know that I exist. If you didn't know this, then you wouldn't even consider speaking to me, and that should be proof enough for you. But what's this retort you just made? "I may be an illusion?" Sure, but "what I am" is not what you were asking. Even if I am an illusion, the illusion exists since you are asking it a question. As long as you are addressing "something" then this "something" is relevant to you in some way and therefore this "something" exists (because what doesn't exist is not relevant).
 P: 506 Following out of whacks post, ask him this -> "if i didnt exist why would you be asking me this question?"
 P: 33 you can't prove anything exists besides yourself. Search the archives, and you'll find some deep conversation on the concept of existence. That wouldn't work octelgodopod, due to he could say something along the lines "If I don't exist then I'm not asking you this question, prove to me my existence" (two non-existent beings having a conversation) I think that's what the original question was to prove all existence..maybe it was just to prove something exists. Then your at a stalemate, and he wins.
 P: 5 No it was to prove that I exist.....
P: 362
 Quote by HallsofIvy I know I exist. Since you are the one I am not sure of, I see no point in trying to prove to you that I exist!
I say the same thing to you. Prove me wrong *****!
P: 5
Thank you for taking the time to type all this. I think this might help me out :D
 P: 3 "I think therefore I am".... This means that I know I exist but I dont know you exist... This then leads onto metaphysical skepticism. The whole universe and everyone and thing in it, except for myself does not exist, other than within my own thoughts. Keeping this simple. If we consider the big bang, the creation of the universe seems to be impossible as to why it happened in the first place. Not how, but why. It would be far simpler to conclude it didnt happen and therefore does not exist. This supports: I think therefore I am but you may not exist. My answer would be, "Cogito ergo sum,.. however, I dont know you exist, prove to me you exist." Which is actually what he is asking you, and of course you can't. Could write pages on this subject, but its not a healthy place to go. p.s. because he asked the question does not mean he exists. Like when it rains does not mean the water is real .
P: 1,330
 Quote by Madmonkey "I think therefore I am".... This means that I know I exist but I dont know you exist...
Close...but that is not really what Descartes said.

'Cogito Ergo Sum' doesn't address knowledge of other people.

Descartes was looking for 'certainty'.

His argument is about 'certain knowledge', not just knowledge. He was looking for a way to refute the radical skeptics who questioned everything.

The argument goes like this: As a radical skeptic, one could honestly doubt many things, but there is one thing that I cannot honestly doubt; that I am doubting.
I am therefore 'something that doubts', or minimally, 'doubting exists'. Its what philosophers call 'self-evident'.

From there he went on to logically 'prove' that he could know that other people and even god exists.

Those proofs have been questioned by lots of people, but his argument about 'certain knowledge of the self' has been very influencial.
 PF Gold P: 4,292 Be really loud and disruptive during class and when he confronts you then ask him: "Do I exist?" If he doesn't answer yes, then continue being disruptive. Give him another chance a moment later: "Do I exist?" If he doesn't answer yes, continue being disruptive...
P: 107
Refer him to the DSM-IV r, (Diagnostic and Statistical Manual of Mental Disorders, 4th Edition, revised) - code 300.6: "Depersonalization disorder."
 The core symptom of depersonalization disorder is the subjective experience of unreality, and as such there are no clinical signs. Depersonalization disorder (DPD) is a dissociative disorder in which the sufferer is affected by persistent or recurrent feelings of depersonalization and/or derealization. The symptoms include a sense of automation, going through the motions of life but not experiencing it, feeling as though one is in a movie, feeling as though one is in a dream, feeling a disconnection from one's body; out-of-body experience, a detachment from one's body, environment and difficulty relating oneself to reality.
http://en.wikipedia.org/wiki/Depersonalization_disorder

Be sure to offer a referral for professional diagnosis and treatment.
PF Gold
P: 4,292
 Quote by Newai Refer him to the DSM-IV r, (Diagnostic and Statistical Manual of Mental Disorders, 4th Edition, revised) - code 300.6: "Depersonalization disorder."http://en.wikipedia.org/wiki/Depersonalization_disorder Be sure to offer a referral for professional diagnosis and treatment.
hrm... I wonder if that's associated with the angular gyrus at all.
 P: 107 Or try... Concubitus, ergo sum, sum, sum.

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