well. As usual, I tend to side with Saizou in this one (sorry nataku and Jakko T-T). I completely agree with his assessment of reality.
"In practice, it is very hard, if not impossible to be certain that a observation is completely perfect."
yes. but we arent talking about practice here. if we ARE talking about practice, than your final conclusion is entirely reasonable.
I think that, possibly beyond the realm of human udnerstanding (not necessarily into God), there is a completely perfect observation.