Date: 1798

"In making observations upon subjects which are new to us, we must be content to use our memory unassisted at first by our reason; we must treasure up the ore and rubbish together, because we cannot immediately distinguish them from each other."

— Edgeworth, Maria

Date: 1999

"On its own this trigger, as we can see from the earlier definition, is not going to generate consciousness. Imagine a candyfloss machine with a stick in the centre that then gathers more and more candyfloss as time goes on. Think of the epicentre as the stick in the centre, the burgeoning candy...

— Greenfield, Susan (b. 1950)

Date: 2016

"The plant's radical desire for what has decayed in the soil stands as a figure for memory, the reaching into dark recesses for what used to be alive."

— Wampole, Christy

Date: December 31, 2016

"The human brain didn't evolve like a piece of sedimentary rock, with layers of increasing cognitive sophistication slowly accruing over time."

— Barrett, Lisa Feldman (b. 1963)