Who said "It's perfectly clear to me that you're not thinking at all"?

This quote is attributed to Alice.

It's perfectly clear to me that you're not thinking at all - Alice

"It's perfectly clear to me that you're not thinking at all"

Alice

Character in Through the Looking-Glass

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"It's no use going back to yesterday, because I was a different person then."

"The question is whether you can make words mean so many different things."

"Well, I never heard it before, but it sounds uncommon nonsense."

"This must be the wood where things have no names."