Used and loved by millions
Since I tried Ludwig back in 2017, I have been constantly using it in both editing and translation. Ever since, I suggest it to my translators at ProSciEditing.

Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com
secondhand knowledge
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "secondhand knowledge" is correct and usable in written English.
It can be used to describe information or understanding that is acquired from someone else rather than through direct experience. Example: "While I appreciate your insights, I must admit that my understanding of the topic is based on secondhand knowledge from various articles and discussions."
✓ Grammatically correct
News & Media
Science
Alternative expressions(4)
Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Human-verified examples from authoritative sources
Exact Expressions
8 human-written examples
Some artists had only secondhand knowledge of Italy.
News & Media
What can a tourist offer apart from an outsider's bewilderment, a guidebook's secondhand knowledge, ignorance and cultural misunderstanding?
News & Media
Wieland was flooded with responses, mostly from people with secondhand knowledge of animals owned by friends or neighbors.
News & Media
"The man in the street talks about it but does not have first- or secondhand knowledge of it," he said.
News & Media
Then he pointed out that most of the doctors in the survey were relying on secondhand knowledge because they didn't work in this field themselves.
News & Media
Much has been made of the fact that Bernard had written such a letter for John, but the letter itself shows that he had only secondhand knowledge of John, and it seems rather lukewarm.
Science
Human-verified similar examples from authoritative sources
Similar Expressions
50 human-written examples
Faced with this scarcity of firsthand knowledge and secondhand report (a lack aggravated by Winberg's tendency to tear up letters that cause him emotional distress), the Chais are forced to fictionalize, sometimes brazenly.
News & Media
This study sought to (1) assess participants' general knowledge of secondhand smoke (SHS) dangers; (2) assess participants' awareness of and specific knowledge of smoke-free (SF) policies; and (3) assess the extent to which such policies are socially enforced and gather examples of successful social enforcement.
Science
Someone with deeper knowledge — or, say, a secondhand memory gleaned from reading The Village Voice as a teenager in the provinces — will be gratified to see stalwarts of the era like Scott B and Beth B, Lydia Lunch, Fab 5 Freddy and Amos Poe, in their youthful vigor and their sturdy middle age.
News & Media
If firsthand and secondhand play has not built your knowledge of the rules of football, try going to a library or bookstore and locating a book that contains the printed word.
Wiki
It was also the case of knowledge on health consequences of secondhand smoke (OR: 2.4, 3.9, and 5.7, respectively).
Science
Expert writing Tips
Best practice
When using "secondhand knowledge", clarify the source of the information to maintain transparency and credibility. For example, specify if it comes from books, reports, or other individuals.
Common error
Avoid presenting "secondhand knowledge" as if it were firsthand expertise. Clearly differentiate between personal experience and information gathered from others to avoid misrepresentation.
Source & Trust
86%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "secondhand knowledge" functions as a noun phrase that describes information or understanding gained indirectly, rather than through direct experience. Ludwig AI indicates this phrase is correct and usable in written English.
Frequent in
News & Media
40%
Science
40%
Encyclopedias
6%
Less common in
Wiki
6%
Formal & Business
4%
Reference
4%
Ludwig's WRAP-UP
The term "secondhand knowledge" is a noun phrase used to describe information or understanding gained indirectly, differentiating it from direct, personal experience. Ludwig confirms the phrase is grammatically correct and acceptable. It appears across diverse sources, but most frequently in News & Media and Scientific contexts. When using this phrase, it's important to clarify the origin of the information and not present it as firsthand expertise. Alternatives include "indirect understanding" or "derivative knowledge". Be aware of the potential for misrepresentation, especially in academic or professional settings.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
secondhand information
Replaces "knowledge" with the more general term "information".
indirect understanding
Focuses on the lack of direct experience in gaining knowledge.
derivative knowledge
Highlights that the knowledge is obtained from another source.
vicarious knowledge
Emphasizes experiencing something through another person.
knowledge by proxy
Indicates that the knowledge is obtained through a representative or substitute.
mediated knowledge
Emphasizes the role of a medium or intermediary in acquiring knowledge.
hearsay
Implies that the information is unverified and possibly unreliable.
reported knowledge
Highlights that the knowledge comes from a report or account.
borrowed knowledge
Highlights that the knowledge is not original but taken from someone else.
received wisdom
Focuses on knowledge that is widely accepted but not necessarily verified.
FAQs
How can I use "secondhand knowledge" in a sentence?
"Secondhand knowledge" is used to describe information acquired indirectly. For example, "My understanding of the intricacies of quantum physics is based on "secondhand knowledge" gleaned from popular science books."
What's the difference between "secondhand knowledge" and personal experience?
"Secondhand knowledge" is information you've learned from others or from sources, whereas personal experience is knowledge you've gained directly through your own observations and actions. Personal experience often carries more weight due to its direct, verifiable nature.
Is it acceptable to rely on "secondhand knowledge" in academic writing?
Yes, but it's crucial to properly cite your sources when using "secondhand knowledge" in academic writing. This ensures that you give credit to the original sources and avoid plagiarism.
What are some alternatives to the term "secondhand knowledge"?
Alternatives include "indirect understanding", "derivative knowledge", or "vicarious knowledge", depending on the specific nuance you want to convey. Each term highlights a slightly different aspect of indirect learning.
Editing plus AI, all in one place.
Stop switching between tools. Your AI writing partner for everything—polishing proposals, crafting emails, finding the right tone.
Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Source & Trust
86%
Authority and reliability
4.5/5
Expert rating
Real-world application tested