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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
I only know
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "I only know" is correct and can be used in written English.
You can use it to emphasize that you have limited knowledge or understanding of something. For example: "I only know the basics of accounting, so I'm not sure how to complete this calculation."
✓ Grammatically correct
News & Media
Academia
Science
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
60 human-written examples
I only know mine".
News & Media
I only know one speed.
News & Media
I only know Yiddish literature".
News & Media
I only know one thing.
News & Media
I only know voters.
News & Media
"I only know a name," Louise said.
News & Media
I only know her to say hi.
News & Media
I only know what the Bible says".
News & Media
I only know notes and chords.
News & Media
I only know about one.
News & Media
I only know of one".
News & Media
Expert writing Tips
Best practice
Use "I only know" to clearly state the limits of your knowledge or understanding. This helps manage expectations and avoids miscommunication.
Common error
Avoid using "I only know" when you actually possess more information than you're letting on. This can come across as disingenuous or evasive.
Source & Trust
83%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "I only know" primarily functions as a declarative statement expressing limited knowledge or awareness. Ludwig confirms this with numerous examples demonstrating its use to convey the extent of one's understanding or information.
Frequent in
News & Media
63%
Academia
13%
Science
12%
Less common in
Wiki
3%
Formal & Business
3%
Reference
3%
Ludwig's WRAP-UP
In summary, "I only know" is a grammatically sound and frequently used phrase that serves to express limited knowledge or understanding. Ludwig AI affirms its correctness and provides various examples of its usage across different contexts, including News & Media, Academia, and Science. The phrase is generally neutral in tone and serves the purpose of managing expectations by clearly defining the scope of one's knowledge. When using this phrase, it's best practice to clearly state the limits of your knowledge to avoid miscommunication, and avoid using it when you possess more information than you're letting on. Related phrases like "all I know is" and "the only thing I know is" can be used as alternatives to convey a similar meaning.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
All I know is
Emphasizes the speaker's certainty about a particular fact while acknowledging limited overall knowledge.
The only thing I know is
Highlights a single piece of known information, contrasting it with a larger area of uncertainty.
I'm only aware of
Indicates limited awareness or familiarity with something, often implying that more information exists.
As far as I'm aware
Expresses a belief based on available knowledge, while acknowledging the possibility of being mistaken.
To the best of my knowledge
Indicates that the speaker is providing information that they believe to be accurate, but with a degree of uncertainty.
What I do know is
Highlights a specific piece of information that the speaker is certain about, often in contrast to things they don't know.
I'm limited to the knowledge that
Acknowledges a restriction on the speaker's understanding or information.
My understanding is limited to
States that the speaker's comprehension is not comprehensive.
I can only confirm
Indicates the speaker's ability to verify only a specific detail or fact.
I'm only familiar with
Suggests that the speaker has some, but not extensive, knowledge of a subject.
FAQs
How can I use "I only know" in a sentence?
You can use "I only know" to express limited knowledge about something, for example, "I only know the basics of coding, so I can't build a complex application."
What can I say instead of "I only know"?
You can use alternatives like "all I know is", "the only thing I know is", or "as far as I'm aware" depending on the context.
Is it correct to say "I only know of" instead of "I only know"?
Yes, "I only know of" is correct when you're indicating that you're aware of something's existence or have heard about it, but don't necessarily have detailed knowledge. For example, "I only know of that restaurant, but I've never eaten there."
What's the difference between "I only know" and "I just know"?
"I only know" expresses a limitation of knowledge, while "I just know" expresses intuition or a feeling without necessarily having concrete evidence.
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Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Source & Trust
83%
Authority and reliability
4.5/5
Expert rating
Real-world application tested