know all the answers


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know all the answers

1. To be able to provide information about any given topic, or reliable advice about life in general. Why are you asking me about the afterlife? It's not like I know all the answers! I'm here because I'm going to fail biology, and you always know all the answers.
2. To be overly confident in one's knowledge. Allison thinks she knows all the answers, but she's clueless about a lot of things.
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Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.

know all the answers

Also, know a thing or two; know it all; know one's way around. Be extremely knowledgeable or experienced. These idioms may be used somewhat differently, expressing overconfidence, as in Helen always knew all the answers, or thought she did, or competence, as in Bob knows a thing or two about battery technology, or ruefulness, as in I thought I knew it all about plants and then I got poison ivy, or genuine expertise, as in John knows his way around tax forms. The first term dates from the early 1900s, the second from the later 1700s, the third from the later 1800s, and the fourth, also put as know one's way about, dates from the 1500s. Also see know one's stuff; know the ropes; under tricks of the trade.
See also: all, answer, know
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.

know (or have) all the answers

be confident in your knowledge of something, typically without justification. informal
See also: all, answer, know
Farlex Partner Idioms Dictionary © Farlex 2017

have/know all the ˈanswers

be or seem to be more intelligent or know more than others: He’s an economist who thinks he knows all the answers.
See also: all, answer, have, know
Farlex Partner Idioms Dictionary © Farlex 2017
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