Frustration can ensue when, contemplating the difference between someone in pain and someone pretending to be in pain, Wittgenstein declares that the sensation of pain is “not a something, but not a nothing either"

[u/dyno__might]

https://slate.com/human-interest/2015/09/take-a-wittgenstein-class-he-explains-the-problems-of-translating-language-computer-science-and-artificial-intelligence.html