The difference between Brain trust and Think tank
When used as nouns, brain trust means originally, a group of experts who advise a government, often informally, whereas think tank means a group of people who collectively perform research and develop reports and recommendations on topics relating to strategic planning or public policy, and which is usually funded by corporate, government, or special interests.
check bellow for the other definitions of Brain trust and Think tank
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Brain trust as a noun (chiefly, US):
Originally, a group of experts who advise a government, often informally.
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Brain trust as a noun:
More recently, any group of experts assembled to give advice.
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Think tank as a noun (idiomatic):
A group of people who collectively perform research and develop reports and recommendations on topics relating to strategic planning or public policy, and which is usually funded by corporate, government, or special interests.
Examples:
"synonyms: think factory"