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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
can only assert that
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "can only assert that" is correct and usable in written English.
It can be used when you want to express a limitation in what you can claim or state about a particular subject. Example: "Based on the available evidence, I can only assert that the results are inconclusive."
✓ Grammatically correct
Science
News & Media
Formal & Business
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
3 human-written examples
Because the signals from the probes do not allow for accurate mapping of the position of a SNP within a probe at the given probe density, we can only assert that somewhere within a probe there is likely a polymorphism.
Science
It is tempting to speculate that HGT helped A. oryzae adapt to some new evolutionary niche, but based on our analysis we can only assert that HGT enhanced the hydrolytic and fermentation abilities of this species.
Science
Thus, we can only assert that Prosthecobacterial tubulins evolved from within the eukaryotic subtree but the actual scenario for their evolution remains uncertain.
Science
Human-verified similar examples from authoritative sources
Similar Expressions
56 human-written examples
This suggests that the additive effects MTC model can readily be used in situations where one can only assert approximate additivity.
Science
Today, consumers can only assert their rights after the event, through the rules on liability.
Science
If the eliminativist thinks that assertion only imposes the aim of expressing a truth, then he can consistently assert that 'know' is a defective term.
Science
Hence, from our previous considerations, we can assert that (2.15).
(iii) It can be asserted that is relatively compact. .
It can be asserted that is relatively compact.
I can only admire my fellow New Yorkers who risk life and limb to assert that idea.
News & Media
We assert that is bounded.
Expert writing Tips
Best practice
Use "can only assert that" when you want to express a conclusion based on limited evidence or specific constraints. Be clear about the limitations to maintain credibility.
Common error
Avoid using "can only assert that" if you possess strong evidence. This phrase is best suited for situations where you want to acknowledge the limitations of your claim. Strong assertions require strong proof.
Source & Trust
84%
Authority and reliability
4.4/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "can only assert that" functions as a hedge, limiting the scope or strength of a claim. It indicates that the speaker or writer is not fully confident in the statement or lacks sufficient evidence to make a stronger assertion, as shown in the examples provided by Ludwig.
Frequent in
Science
66%
News & Media
22%
Formal & Business
12%
Less common in
Encyclopedias
0%
Wiki
0%
Reference
0%
Ludwig's WRAP-UP
In summary, "can only assert that" is a useful phrase for expressing a qualified statement, indicating a limitation in the evidence or confidence behind a claim. Ludwig's analysis reveals it to be grammatically correct and primarily used in formal and scientific contexts. When employing this phrase, it's important to be mindful of overstating your claims and ensure transparency about the limitations of your assertion. The suggested alternative phrases, such as "can only state that" or "can only suggest that", can help to fine-tune the nuance of your message.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
can only state that
Replaces "assert" with the more neutral "state", softening the claim slightly.
can only maintain that
Suggests a continued defense of a position, rather than an initial claim.
can only conclude that
Emphasizes the end result of a thought process or investigation.
can only suggest that
Conveys a weaker level of certainty compared to "assert".
can only surmise that
Implies a conclusion based on limited evidence or guesswork.
can only infer that
Highlights that the conclusion is drawn from reasoning rather than direct evidence.
can only deduce that
Indicates a logical conclusion based on known facts.
can only observe that
Focuses on what can be seen or noticed, rather than a stronger claim.
can only point out that
Highlights a specific fact or detail without necessarily making a broader argument.
can only acknowledge that
Indicates recognition of a fact or situation, without necessarily endorsing it.
FAQs
How can I use "can only assert that" in a sentence?
Use "can only assert that" when you want to express a qualified statement or a conclusion that is based on limited evidence. For instance, "Based on the data, we "can only assert that" there is a correlation, not causation".
What are some alternatives to "can only assert that"?
You can use alternatives like "can only state that", "can only suggest that", or "can only conclude that" depending on the nuance you want to convey.
What does "can only assert that" imply about the strength of a statement?
It implies that the statement is made with some reservation or limitation. It indicates that while the assertion is being made, there might be factors preventing a stronger or more definitive claim.
Is it appropriate to use "can only assert that" in formal writing?
Yes, it is appropriate in formal writing, especially when presenting research findings or arguments where limitations need to be acknowledged. It demonstrates intellectual honesty and transparency.
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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
84%
Authority and reliability
4.4/5
Expert rating
Real-world application tested