∕∕  
  We learn the word ‘red’ under part. circs. Certain objects are usually red & keep their colour, most people agree with us in our colour judgements. Suppose all this changes: I see blood unaccountably sometimes one sometimes another colour & the people around me all make different statements. But couldn't I in all this chaos retain
my
the
meaning of ‘red’, ‘blue’, etc. I although I couldn't make myself understood to anyone?
  Samples e.g. would all constantly change their colour – ‘or ◇◇◇ changing the meaning does it only seem so to me?’ “Now am I mad or have I really called this ‘red’ yesterday?”