I can distinguish a carpet from a TV but only because I know about entertainment. Without that human value, there is no TV.
Yes, I know. WE need some concept to set the physical limits.
Jonesboy,
There is an OBJECTIVE REALITY regardless what you think or don't and despite you existing or not.
RATIONALITY is a mark of how close you can approximate reality with your inner constructs about it.
The closer you approximate reality the better your ability to survive would be and thus the more you are likely to reproduce and pass on the genes that afforded you to better approximate reality.
The next generation then can either be more or less rational than your.
Consider this scenario:
You are sick and need an operation. They anesthetize you and operate on you. Since you are asleep according to your theory nothing can happen since nothing then exists while you are asleep.
However when you wake up, there is pain and a cut and you have to take pain killers to stop all the pain and antibiotics to stop an infection.
According to your philosophy none of this should be happening and especially infections since you cannot even see the bacteria awake or asleep.
If things only take on material existence when people know about them...how did most of Europe get wiped out by a plague virus that no one on earth even knew it existed?
What about the American Natives and Small Pox?
For that matter...where did the Conquistadores materialize from if the Natives never knew there were people or a world outside theirs.
Likewise...how did the Americas come into existence if Columbus did not even know they existed....are we in China right now?
Can you see how meaningless your ideas are.
Remember.....there is an OBJECTIVE reality out there outside your brain.
You can elect to try and approximate to it as closely as you can or you can elect to go around DELUDED...it is up to you....just thank your lucky stars that you have the luxury to think the way you do and still survive.... other people have to interact with reality so as to survive.