educated guess, an

educated guess

A thoughtful, well-reasoned guess; a guess with some basis in one's knowledge. Class, we've studied cells all semester. Take an educated guess as to what the answer might be.
See also: educated, guess
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.

educated guess, an

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]
See also: educated
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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