> There is no way to find out that our perception is different. Wittgenstein's point is more that there is no way in which a distinction of that kind could eve

> There is no way to find out that our perception is different. Wittgenstein's point is more that there is no way in which a distinction of that kind could even be intelligible in the way that you have presented it. What is intelligible is our public behavior, namely our language use, so to find out if what you perceive is different you can ask someone if you're looking at the same thing, if it has the same characteristics, etc. He would point to the fact that we don't have radical uncertainty in our day to day life and perception. The philosophical question is a question of sense and nonsense around the concept rather than a metaphysical question about an "inside" vs. an "outside". I would really recommend reading Wittgenstein's Philosophical Investigations if you are interested in these kinds of questions, it's incredibly influential in philosophy precisely because of the way it approaches "age-old" problems in ways that lead to clarity and very interesting results.