originally posted by Jonathan Loesberg:
originally posted by Oswaldo Costa:
I disagree that an illusion needs a subject to experience it. This is only within linguistic logic, which I consider incapable of throwing light on existential matters. And while I don't believe that existential proofs are possible at all, I especially don't believe they can be derived from linguistic logic.
Since Plato's cave and surely earlier human beings have speculated about the possibly illusory nature of what we perceive as reality. If our entire universe were to be, say, a natural hologram, then both the thinker and the thought would be part and parcel of the same illusion, an illusion that is held by no one. The hologram could just exist, just as the universe could just exist without requiring a maker.
Of course on a day to day basis we go around believing that we exist in the manner in which we perceive ourselves, but there cannot be complete certainty, nor can it be derived from linguistic logic.
You've really painted yourself into an impossible philosophical corner. It's not merely language. All the acts you describe entail your awareness that you are engaging in them. You can deny that illusion is a mental experience but you can't really coherently think it. If you believe you exist, you experience an act of believing--or have the illusion that you experience the act of believing, if you will, though I don't know how you can have an illusion about believing without have an inaccurate belief that you are believing, which is pretty clearly incoherent. I can say that the moon is green cheese but that won't make it so. There is a reason no one has argued against Descarte's claim. Even in your supposed case, if the hologram is a thinker, then it exists as such. It may not have material existence, but I assume that's not all you are arguing for. Plato's allegory, of course, did not question the existence of the human beings in the cave.
It's also a completely unnecessary corner. You can still commit yourself to radical solipsism, a position that is simultaneously unproveable and completely without any consequence, but at least tenable. And, of course, you don't have to commit yourself to radical solipsism to hold either ontological or epistemological relativism.