educated guess, an

educated guess, an idiom
A speculation based on past experience or knowledge, as in I'm not sure how much meat we need to feed twelve, but I'll make an educated guess and say six pounds. [Mid-1900s]

The American Heritage® Dictionary of Idioms by Christine Ammer. Copyright © 2003, 1997 by The Christine Ammer 1992 Trust. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

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