I perceive and I assume I can distinguish between true perception and false perception. However, if I cannot prove (without doubt) whether what I perceive is real then how can I be certain if I am perceiving at all?
Cogito ergo sum; or, I think, therefore I am. The first and, what I believe to be, the only item of knowledge.
Perception is my reality and this is where I am forever trapped. Or am I free?