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
cannot rule out
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "cannot rule out" is correct and usable in written English.
It is typically used in contexts where one is indicating that a possibility remains, often in scientific, legal, or analytical discussions. Example: "While the evidence is inconclusive, we cannot rule out the possibility of a connection between the two events."
✓ Grammatically correct
Science
News & Media
Alternative expressions(2)
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
59 human-written examples
We cannot rule out a similar scenario for HPyV9.
Science
"We cannot rule out anything," she said.
News & Media
"I cannot rule out the possibility of using DDT.
News & Media
However, we cannot rule out another kind of outcome.
News & Media
"We cannot rule out violent responses," he says.
News & Media
Cable says he cannot rule out increasing VAT.
News & Media
"I cannot rule out tampering," he said in an interview.
News & Media
We cannot rule out that this relationship may be artificial.
However, we cannot rule out some level of chain scission.
Police have said they cannot rule out finding more bodies.
News & Media
However, we cannot rule out that different events might have taken place.
Science
Expert writing Tips
Best practice
Use "cannot rule out" when you want to acknowledge a possibility, even if it seems unlikely. It's often used to maintain objectivity in analytical or investigative contexts.
Common error
Avoid using "cannot rule out" when you want to express strong doubt. This phrase suggests a possibility remains, so use stronger language if your intention is to dismiss an idea.
Source & Trust
84%
Authority and reliability
4.4/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "cannot rule out" functions as a modal expression of possibility. It indicates that a particular outcome or explanation cannot be definitively rejected, acknowledging uncertainty. Ludwig confirms its correct usage in various contexts.
Frequent in
Science
57%
News & Media
43%
Formal & Business
0%
Less common in
Encyclopedias
0%
Wiki
0%
Reference
0%
Ludwig's WRAP-UP
In summary, the phrase "cannot rule out" is a grammatically sound and frequently employed expression used to acknowledge possibilities, particularly in scientific and news contexts. As Ludwig AI indicates, it's a way of maintaining objectivity by refraining from dismissing potential outcomes. The phrase is more common in formal or scientific writing. While alternative expressions like "cannot dismiss" or "must consider" exist, the selection should align with the intended tone and context. Remember to use this phrase when uncertainty needs emphasizing rather than conveying strong doubt.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
cannot dismiss
Focuses on the inability to disregard or reject something as untrue or irrelevant.
cannot exclude
Emphasizes the impossibility of eliminating a particular option or explanation.
cannot discount
Highlights the necessity of considering something as a relevant factor.
must consider
Indicates a strong obligation to take something into account.
should consider
Suggests that something warrants attention, though perhaps not as urgently.
have to consider
Highlights a necessity to take something into account.
cannot ignore
Underlines the importance of something to be overlooked.
must entertain
Highlights the need of considering a possibility.
have to entertain
Highlights the need of considering a possibility.
have to bear in mind
Implies that remembering or acknowledging some aspect is essential.
FAQs
How can I use "cannot rule out" in a sentence?
Use "cannot rule out" to express that a particular possibility should still be considered. For example, "We "cannot rule out the possibility" of further complications".
What is a good alternative to "cannot rule out"?
Depending on the context, suitable alternatives to "cannot rule out" include phrases like "cannot exclude", "cannot dismiss", or "must consider".
Is it correct to say "can rule out"?
Yes, "can rule out" is grammatically correct and means that something is not possible or should not be considered. The opposite, "cannot rule out", means it's still a possibility.
What does "cannot rule out the possibility" imply?
"Cannot rule out the possibility" suggests that while something may seem unlikely, it still could happen or be true. It acknowledges uncertainty and the need to keep an open mind.
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
84%
Authority and reliability
4.4/5
Expert rating
Real-world application tested