N Consider now this case: Someone says I remember ˇyesterday having seen everything red green & vice versa.
  Consider this case: someone sais
I can't underst.
it's queer
I see everything red
blue
green
today & vice versa. We answer: it must look queer! He sais it does & e.g. goes on to say ho cold the glowing cole looks & how warm the clear (blue) sky. I think we should under these or similar circumst. be incl. to say that he saw red what we saw green. And again we should say that we know that he means by the words blue & red what we do as he has always used them as we
had
did
.