"What do we mean by "knowledge" or "understanding"? And how do billions of neurons achieve them? These are complete mysteries. Admittedly, cognitive neuroscientists are still very vague about the exact meaning of words like "understand," "think," and indeed the word "meaning" itself."

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Still,[...] in all forms of comics the sequential artist relies upon the tacit cooperation of the reader. This cooperation is based upon the convention of reading and the common cognitive disciplines. Indeed, it is this very voluntary cooperation, so unique to comics, that underlies the contract between artist and audience.

— Will Eisner