“Surely seeing is one thing, & showing that I see is another thing”. – This certainly, is like saying “skipping is one thing &
jumping another”. But here there is a supplement to this statement & we can say “skipping is this (showing it) & jumping this (showing it)”. Now how about this supplement in the first case? “Seeing red is this (showing it) & showing that we see red, this¤ (showing it).” The point is just that there isn't a ‘showing that I see’ except showing that I see. “But can't I say: seeing red is what I'm doing now” (looking at something red)? And although in a sense the other man can't directly see what || be aware of the acting or activity I'm talking about, I certainly know what it is it is that I'm talking about. That is although for him I can't point directly to the my seeing red, for myself I can point to it, & in this sense I can give an ostensive definition of the expression to myself. ← But an ostensive definition is not a magic act of conjury.
     If I explain to someone to || the use of ‒ ‒ ‒ by ‒ ‒ ‒ Giving the ostensive definition simply consists in ‒ ‒ ‒.
     One might be inclined to say that castling was not just the act of … .
     But it is the game of which it is part … .
So what does giving to myself the ostensive definition of red consist in? I suppose we should say I suppose looking || – Now how am I to describe it shall I say seeing red &
saying to myself that I do. || ‘this is red.’ || ‘I see red.’ Or is it “seeing a certain colour sensation & saying ‘I see red’”? The first version it seems doesn't account for the fact || won't do as it isn't essential to us that when I do for myself what I call ‘seeing red’ that should necessarily be what the others understand || mean by seeing red. || The first version I don't like I assume that the others know || have what the colour || very same private impression which I am having. So I would rather leave it open what colour I am concentrating my attention on. But then how can I call it a colour? Isn't it just as uncertain that I mean by colour what he means as that I mean by red what they mean & doesn't the same of course holds for || applies to ‘seeing’ (for what here I mean by the word is not an activity of the human eye). (The second version is justified only if I wish to say that it does not matter here to which of the colours (say, red, green, blue, yellow) he gives || he assigns the name ‘red’ & so this means we might have said “he sees a same colour, say, blue & says ‘I see red.’”.)