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
are not yet understood
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "are not yet understood" is correct and usable in written English.
It can be used when discussing concepts, ideas, or phenomena that have not been fully grasped or comprehended at a particular point in time. Example: "Many aspects of quantum mechanics are not yet understood, leaving room for further research and exploration."
✓ Grammatically correct
Science
News & Media
Encyclopedias
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
Dvorăk's peculiar lines of expression are not yet understood.
News & Media
However, the controlling mechanisms that drive the evolution are not yet understood.
Science
The exact mechanisms through which cigarette smoke reduces the risk of preeclampsia are not yet understood.
Science
The structural and thermodynamic origins of this behavior are not yet understood.
Science
However, the nanocarriers transport related mechanisms in epidermal epithelial cells are not yet understood.
Science
The technical processes by which these effects were achieved are not yet understood.
Encyclopedias
On the other hand, there could be "brain and gut interactions" that are not yet understood.
News & Media
The exact mechanisms through which cigarette smoke reduces the risk of pre-eclampsia are not yet understood.
Science
Potential behaviors of these markets are not yet understood because these markets are still in the early stages of development.
Science
The mechanistic details by which DAP5-eIF3d and eIF4E-eIF4GI mRNA selectivity are determined are not yet understood.
Science & Research
The corrosion reactions which take place at a defect free metal/polymer interface and the delamination in the vicinity of defects are not yet understood.
Science
Expert writing Tips
Best practice
Use this phrase to introduce a research gap or an area where further investigation is needed.
Common error
Avoid using "are not yet understood" when some level of understanding exists. Instead, use phrases like "partially understood" or "not fully understood" to more accurately reflect the situation.
Source & Trust
83%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "are not yet understood" functions as a declarative statement indicating a current lack of knowledge or comprehension regarding a specific subject. Ludwig examples show its prevalence across various scientific and general contexts, confirming its role in highlighting areas needing further research or clarification. The Ludwig AI confirms that is grammatically correct and usable in written English.
Frequent in
Science
76%
News & Media
11%
Encyclopedias
2%
Less common in
Formal & Business
0%
Wiki
0%
Reference
0%
Ludwig's WRAP-UP
The phrase "are not yet understood" serves as a crucial indicator of knowledge gaps, predominately within scientific and academic spheres. As Ludwig AI confirms, this grammatically sound phrase effectively highlights areas needing further investigation. While alternatives like "remain unclear" and "have yet to be comprehended" exist, "are not yet understood" distinctly emphasizes the current absence of comprehension. When employing this phrase, contextual clarity is paramount to specify what exactly lacks understanding. By adhering to these guidelines, writers can accurately and effectively convey the boundaries of present knowledge.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
remain unclear
This alternative suggests that the subject is still vague or undefined.
have yet to be comprehended
This emphasizes that understanding hasn't been achieved but is anticipated.
are not fully known
This focuses on the incompleteness of the knowledge.
are still a mystery
This implies a sense of intrigue and unsolved nature.
are not well-defined
This highlights the lack of clear boundaries or parameters.
are subject to further investigation
This suggests active research is ongoing to gain understanding.
lack a clear explanation
This points out the absence of a simple or straightforward understanding.
are open to interpretation
This indicates ambiguity and multiple possible understandings.
are poorly characterized
This suggests the subject lacks a detailed description or understanding of its features.
defy explanation
This conveys that the subject resists attempts to understand it.
FAQs
What can I say instead of "are not yet understood"?
You can use alternatives like "remain unclear", "have yet to be comprehended", or "are not fully known" depending on the context.
How to use "are not yet understood" in a sentence?
Use "are not yet understood" to indicate a lack of complete knowledge or comprehension about a particular subject. For example: "The long-term effects of microplastics on human health are not yet understood."
Which is correct, "are not yet understood" or "is not yet understood"?
"Are not yet understood" is used for plural subjects, while "is not yet understood" is used for singular subjects. For example: "The underlying mechanisms are not yet understood," versus "The basic principle is not yet understood."
What's the difference between "are not yet understood" and "are poorly understood"?
"Are not yet understood" implies almost no understanding exists, while "are poorly understood" suggests some understanding is present but incomplete or inaccurate. The choice depends on the degree of existing knowledge.
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
83%
Authority and reliability
4.5/5
Expert rating
Real-world application tested