To answer the OP:
No, we can't. All we can see is that some, many or most experiences seem consistent with each other-- or at least with an idea we have about what underlies them.
Or to put it another way, our reality is the convergence of many experiences toward a smaller set of "truths." But sometimes, with philosophical truths, you can realize that they are rooted in your genetics or in your cultural background, and you can wipe them away. You can say things like "good and evil aren't real except as ideas, and they aren't adding to my enjoyment of my life" and make a conscious choice not to filter your experiences through those ideas any more. I think that's what you're talking about.
No, we can't. All we can see is that some, many or most experiences seem consistent with each other-- or at least with an idea we have about what underlies them.
Or to put it another way, our reality is the convergence of many experiences toward a smaller set of "truths." But sometimes, with philosophical truths, you can realize that they are rooted in your genetics or in your cultural background, and you can wipe them away. You can say things like "good and evil aren't real except as ideas, and they aren't adding to my enjoyment of my life" and make a conscious choice not to filter your experiences through those ideas any more. I think that's what you're talking about.