Educator Michael Hewitt-Gleeson has suggested to add a 7th thinking hat: the Grey Hat for Wisdom.
Why the colour grey? Grey-haired seniors due to their time on earth gather a lot of wisdom, a combination of knowledge and experience. The brain is often referred to as "grey matter". Grey denotes a fuzziness, not crystal clear, but somehow you know it's the right thing to do.
It is different than White Hat thinking which is about data and information. Grey Hat thinking is meta-cognition with context.
It's different than Black Hat thinking which is about judgment and risk. Grey hat thinking is the ability to look back over history and to see forward into the future. To understand cycles, passages of time, the passing of fashions, eras, eons and the many possible futures including extinction, the possibility of no future at all. The long-term wisdom of Grey Hat Thinking may also be useful in raising one’s consciousness of Black Swans.
Grey Hat Thinking means the wisdom to want to see an
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