Hello, this is my introduction. And now, I would like to point out that this is a completely pointless argument because the sky is most definately blue. First of all though. I would like to set perameters for this debate and give defintions. The definiton for "is" shall be "perceived as". And "sky" will be defined as "What you see when you look up outside during the day excluding any possible foreign objects, I.E.: planes, birds, UFO's, Superman, Flying Pigs, etc.