Can't I use the word “to see” in such a way that I call only this→ ‘seen’?”
  But how do I act according to this decision? Do I, e.g. admit that someone else besides me can see it, or do I say that only I can see it?
  Suppose everybody talked only about what we should now describe as What's seen by me L.W.. But they all know what I see; they don't ask me. And if anybody describes it wrongly we say that he can't doesn't speak properly, expresses himself wrongly. There is no such thing as deceiving somone about what I see. – Isn't there even then a temptation Can't I even then imagine a temptation to say, “I can only know what I see not what the others see?”?