Consider the prop.: He makes sure what it
means to him by …. Would you say the word
had meaning to him if it ‘meant something else’ even
And what is the criterion of the same colour coming twice.
showing now what is knowing what seeing is .
  In knowing what seeing ˇred is you seem
to give yourself a sample you say to yourself ‘seeing red is this’ but you
don't because the usual criteria
for the sameness of the sample
don't apply. I can say I call ‘red’
always the same colour or I whenever
I explain red I point to a sample
of the same colour.