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Date: January 11, 2014

"How, then, does its waste — like beta-amyloid, a protein associated with Alzheimer’s disease — get cleared? What happens to all the wrappers and leftovers that litter the room after any mental workout?"

— Konnikova, Maria

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Date: January 11, 2014

"'Think about a fish tank,' says Dr. Nedergaard. 'If you have a tank and no filter, the fish will eventually die. So, how do the brain cells get rid of their waste? Where is their filter?'"

— Konnikova, Maria

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Date: January 11, 2014

"It's [concerning sleep loss] like the difference between a snowstorm's disrupting a single day of trash pickup and a prolonged strike. No longer quite as easy to fix, and even when the strike is over, there's likely to be some stray debris floating around for quite some time yet."

— Konnikova, Maria

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Date: January 11, 2014

"If the main function of sleep is to take out our neural trash, that insight could eventually enable a new understanding of both neurodegenerative diseases and regular, age-related cognitive decline."

— Konnikova, Maria

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Date: January 11, 2014

"One day, scientists might be able to successfully mimic the expansion of the interstitial space that does the mental janitorial work so that we can achieve maximally efficient round-the-clock brain trash pickup."

— Konnikova, Maria

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Date: March 7, 2014

"For Kaku, the brain is a computer made of meat, and understanding the mind is just a really, really hard engineering problem."

— Frank, Adam (b. 1962)

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Date: March 7, 2014

"Minds made of meat (ours) are just one of Kaku’s concerns."

— Frank, Adam (b. 1962)

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Date: March 7, 2014

"If we treat minds like meat-computers, we may end up in a world where that’s the only aspect of their nature we perceive or value."

— Frank, Adam (b. 1962)

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Date: April 21, 2014

"The old gag about LPs being like gasoline / Puddles that go up and dizzy us / With their fumes, and of middle age / Rotating us out of Earth's orbit, stars like / A corrupted computer file / And the forgetful mind, a red-topped / Tupperware when we were young / Now without gravity or capacity li...

— Greenbaum, Jessica

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If one weighs crowns and kingdoms against deeds they may "Far, far too light in Wisdom's eye" may seem--"Nor shake the scale, while Reason holds the beam

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The Mind is a Metaphor is authored by Brad Pasanek, Assistant Professor of English, University of Virginia.