The existence or non-existence of Absolute Certainty cannot be proven.

My opponents points to the law of identity as proof that absolute certainty exists. All of our experiences lead us to the conclusion that one thing is equivalent to itself. But our experiences can indeed be false. Everything you and I experience may be the result of a false reality. It is most often referred to as the brain in a vat or the matrix. Therefore if we are in a false reality where the law of identity does seem to be true it may still not be true in the actual reality. We may never be able to find out if our reality is false or have the cognitive capacity to imagine that something is not itself in an alternate reality but it is still a possibility until proven otherwise. Even in logical systems such as mathematics there is no absolute certainty as these systems rely on conditional statements which rely on unproven axioms or postulates. Only when uncertain assumptions are made, can progress occur through these systems. In regards to actuality your perception of things is not how they really are. Therefore if you see a raven you may think it is a raven but it might not be, it may be just some kind of fake model of a raven. All scientific experiments on this raven may confirm that it is indeed a Raven but all scientific experiments cannot be known absolutely. Scientific evidence is not known absolutely because an infinite amount of tests is required for absolute certainty. Although something may behave the same way 100 times, the 101st time it may act differently. Since experiments cannot be carried out an infinite amout of times you must leave the possibility of it being wrong. I believe it is acceptable to believe things based off of degrees of certainty to progress but absolute certainty is impossible for us right now. The worst possibility is that the Raven you see is just an electrical signal interpreted by your brain, meaning the raven does not really exist. The Dream Argument also perpetuates my case. Suppose you had a vivid dream that you are someone else but then wake up to your supposed "normal" reality. How could you know that perhaps the person you were dreaming of is not actuality while the person you wake up to is just a dream. Just the action of dreaming alone shows we cannot trust our senses fully and we cannot distinguish between illusions and reality. The following argument I have deducted on my own, but it was probably formally created by someone else already. We cannot claim to know if absolute certainty exists or not because we do not know everything. Suppose there is an entity, it does not matter if it human, natural, or supernatural all that matters is that it does know everything. If at least one of these entities exist, then absolute certainty exists because this entity would be certain that something happens (past, present, and future) in a deterministic universe. It would know exactly everything that happened and will happen in actuality, dreams, and other simulations of false realities. However if this entity does not exist, then absolute certainty does not exist because no entities know everything. Therefore to prove that absolute certainty exists you must prove the existence of an all knowing entity (Please don't say God). Sources:. http://en.wikipedia.org...http://scienceblogs.com...