Just about every intelligent philosopher has claimed that: There is no reality, there is only the perception of reality.
And they've formulized it in different ways.
Everyone who thinks(REALLY thinks) about it agrees.
BUT (I'm just trying to be refreshing here, I don't even agree on it, but then again, one cannot be certain of anything, now can one?
What if, the only reason we agree with this assumption is because we're human and therefor would be unable to ever conceive the concept of an truth beyond our conventional perception.
A truth, perhaps if it can be registered by a form of life, only by life which is eg. a pure form of energy. I give this example to stretch your mind a little. It doesn't matter what kind of lifeform would/could understand the truth.
The reason I give this spin to the discussion is because it's selflimiting of you all(imo) to refer to social bands. There are things we could all easily agree on without social ties.
Just because we are incapable to agree on one, and even on the fact that there is one; does NOT imply that there isn't one.
Last Goth says it well:
Truth is a wiggly item. Fact is irrefutable, but opinion based on 'our truths' wiggles.
Facts are often refuted, the facts don't really change, but our perception of them does. Even time and space according to Einstein are simply our current means of assessing the universe, today as we know it. And by no means really exist.
A friend of mine illustrates my point in another way. He in no way believes in a higher power, as a matter a fact, the other day he read in the newspaper(yet, I have been given no actuall resource of official confirmation anywhere) that the idea of God or a higher power is just a part of your brain that is active/inactive. And that scientists have actually found this part. The reason I bring this up is because he does (of course) not believe in a higher power, just a supreme law of nature(universal nature). BUT (omg, I'm actually going to make my point) that we will never know this law, we will always redefine it, specify it and at no point in our life, no point in time(as far as time exists) could anyone ever know it. This however implies that it DOES exist.
I believe I have made my point rather repetitively.
Now, does anybody understand or agree with me on this? :-)