The good thing about science is that it's true whether or not you believe in it. So a shared, what's the term you hallucination? Hallucination would not necessarily be the same hallucination for every person. I can say that we can all eat different hallucinogens. But if we apply the same apparatus to a thing in front of us, and the apparatus identifies the same elements and features like a mass spectrometer then it didn't matter that you were tripping.