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what's the good of

Also, what's the use of. What purpose or advantage is there in, as in What's the good of crying when you can't do anything about it? or What's the use of getting a doctorate in philosophy when you won't be able to get a job afterward? This idiom was first recorded in 1701.

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The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.