A is A. Or can A be not-A, because of differing perceived realities?

Answer 1

Yes, for example an electron can have a positive spin AND the negatove spin at the same time!
So A(electon has positive spin) and not A(electron does not have positive) can be true at the same time.
See:
http://en.wikipedia.org/wiki/Quantum_state

This isdue to something similar to " differing perceived realities" and it is called : Heisenberg uncertainty principle.
http://en.wikipedia.org/wiki/Uncertainty_principle

Answer 2

No, at the point of differing perceive realities, it would become necessary to define them differently. You would then be facing A¹ and A², and so on. Using the word "is", accompanied by the same label, logically and mathmatically defines the subject as equal to itself. I find it ludicrous to believe that perception of a fact changes the fact itself. There is an absolute value and truth to everything, whether or not any being will ever truly know any of those is questionable, but that doesn't necessarily negate the fact itself. I may wholeheartedly perceive from a distance that a brick wall is a spongey and soft material, but upon running at it full speed and headlong, I'm likely to revise my theory because the the brickwall itself was not convinced by my incomplete information.

Answer 3

This Law of Non-contradiction is not subject to personal perspective, it is independent of your belief, thus is absolute. If A can be something other than A, then how did you know that A is what it really is? How would you identify A so others could understand you? Further, your perspective is self refuting, because in your question you acknowledge A as being A, since you used it as such; in addition if your interpretation is relative, then in all likelihood it will be interpreted in a way you didn't intend for it to be, who is right? You end up in a contradiction. The very thing Aristotle is trying to save you from, you are ignoring and falling into, a relative abyss, and that is absolute.

Answer 4

We perceive reality.

Answer 5

If A is A, A can be perceived as not-A, but that doesn't change the fact that it is still A. Much like I can think that the sky is orange, but that doesn't change the fact that it is blue.

Answer 6

The real question is whether reality is subjective or absolute. The nature of perceptuion is dependant on the observer, but if everything is connected then there must be a common arena. It really depends on which epistomological assumptions you prescribe to.

...or how much gunj you smoke.

Answer 7

"A is A" is the Law of Identity. Things are what they are. You can reject it, and some philosophers do, which allows for the contradiction. That contradiction is borne of a different conception, not perception, of reality.

Answer 8

"You might say reality is the result of complex negotiations between the observer and the observed. But that is simply a point of view."
Michio Von Kerr, "The Apotheosis of Reason," CY 11542

Answer 9

yes , its true. But there indeed is a A which is truly A , but people never realize about the true A and go about thinking B is A.

Answer 10

Perception is reality.