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The only thing faster than the speed of thought is the speed of forgetfulness. Good thing we have other people to help us remember.

Vera Nazarian , in The Perpetual Calendar of Inspiration
forgetting thought memory remember forget speed forgetfulness forgetfullness forgetful speed-of-thought

We sometimes hear of things that can travel faster than light. Something called 'the speed of thought' is occasionally proffered. This is an exceptionally silly notion especially since the speed of impulses through the neutrons in our brain is about the same as the speed of a donkey cart.

Carl Sagan , in Cosmos
thought-provoking speed-of-light speed-of-thought