Your questioning of reality is interesting.

The Positivist Paradigm would hold that the observer must be seperated from the object, that human experience would in essencce taint any objective conclusion. This would be the scientific method.

In the Natuarlist Paradigm, the observer and object are inseperable, which would mean the subjective experiences of the observer are intertwined with the object in any conclusion. You cannot have an object without an observer, also not an observer without anything to observe.

Out of Quantum Mechanics comes the theory that matter is affected by the observer. Our intention has an effect reality, real objects, at least on a quantum level, which essential means at every level of matter.

So, the concept of reality is not so concrete as our "reality" would have it, at least not yet, as paradigms keep evolving.

However, I would say for all intensive purposes, the best way to check your reality is to sample as many individuals as possible and see if your view of reality coincides with theirs. I do not believe we are lemmings.

Lewis