CapriUni: Does that include the time during which one reads your description of what we're not supposed to think of? By the way, I'm not thinking of it; I'm thinking of a white horse.

I think it must (therefore, it must), because you have to interpret and decode the words, and in so doing, you give them context and meaning.

That's why you can't unthink someone out of existance: every time you make a decision about who needs to be unthunk, you have no choice but to think about who they are, the context in which you've placed them, and how the context is altered because you've put them there. Every time you do that, you're only reinforcing their existance.