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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
assert of
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "assert of" is not correct and not usable in written English.
It seems to be a misconstruction, as "assert" typically requires a direct object or a clause following it. Example: "He asserted that the project would be completed on time."
⚠ May contain grammatical issues
Science
News & Media
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
5 human-written examples
Hitchcock's meticulous attention to practical details served his radical subjectivism; he didn't hesitate to fill his films with plenty (from inner voices to dream sequences) that assert of characters what can't be seen from fly-on-the-wall observation.
News & Media
It seems proper to consider a word as the name of that which we intend to be understood by it when we use it; of that which any fact that we assert of it is to be understood; of that, in short, concerning which, when we employ the word, we intend to give information.
News & Media
An utterance of (1) is then seen to assert of Lois that she has a belief whose content is captured by the ascriber's utterance of the sentence 'Superman is strong'.
Science
Thus, 'taller' (maius) counts as a relative term because when we assert of something that it is taller that is, when we predicate the term 'taller' of it we necessarily do so in comparison to something else.
Science
If properties are what we assert of objects and what is true/false of objects, then there are simple arguments for the conclusion that at many properties are mind-independent and abstract.
Science
Human-verified similar examples from authoritative sources
Similar Expressions
54 human-written examples
Here's the visual evidence, it asserts, of a warming planet; make of it what you will.
News & Media
In our article on February 23rd ("Eastern porridge") we asserted, of life sentences in the Japanese judicial system, that "life means life".
News & Media
Mark Mellman, a Democratic pollster, asserted of Republicans: "They seem to have adopted a strategy of muting differences, but my sense is they're doing it rhetorically.
News & Media
"Each was profoundly right at some moments and profoundly wrong at others," Thompson asserts of their long, intertwined careers as statesmen, policy makers and public intellectuals.
News & Media
He justifiably asserts of Welles: "Had he shot nothing else in his life, the surviving fragments would have marked him out as a supreme artist in film".
News & Media
Anscombe famously asserted of someone who thought in this way, "I do not want to argue with him: he shows a corrupt mind".
News & Media
Expert writing Tips
Best practice
Avoid using "assert of" in formal writing. Opt for constructions like "assert that" or "assert [something] about [something else]" for clarity and grammatical correctness.
Common error
A common mistake is to follow "assert" with the preposition "of" when a direct object or a "that" clause is required. Ensure that "assert" is followed by what is being asserted or use a more appropriate preposition like "about" if rephrasing.
Source & Trust
85%
Authority and reliability
1.8/5
Expert rating
Real-world application tested
Linguistic Context
The construction "assert of" is grammatically non-standard. The verb "assert" typically requires a direct object or a "that" clause to follow it. In the provided Ludwig examples, this construction appears in contexts where it might be considered a less formal or archaic phrasing.
Frequent in
Science
50%
News & Media
50%
Formal & Business
0%
Less common in
Encyclopedias
0%
Wiki
0%
Reference
0%
Ludwig's WRAP-UP
In summary, while the phrase "assert of" appears in some texts, Ludwig AI indicates that it is grammatically incorrect in contemporary standard English. It's a misconstruction that doesn't align with common grammatical patterns. The intended meaning is generally to declare or state something about a subject. For clearer communication, it's best to use alternatives like "assert that" or "assert [something] about [something else]". The phrase’s usage is rare and is spread between news media and science contexts. Therefore, using this phrase can lead to confusion and is generally not recommended.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
assert about
Changes the preposition to "about", which is more common after "assert" when discussing the subject of the assertion.
state concerning
Replaces "assert" with "state" and "of" with "concerning", offering a more formal tone while keeping the subject matter the same.
claim regarding
Substitutes "assert" with "claim" and "of" with "regarding", which provides a slightly less forceful statement.
declare in relation to
Uses "declare" instead of "assert" and "in relation to" in place of "of", changing the syntax to be more descriptive and formal.
affirm with respect to
Replaces "assert" with "affirm" and "of" with "with respect to", offering a more affirmative and specific connection to the subject.
posit about
Uses "posit" instead of "assert" and "about" instead of "of", giving a more academic tone to the statement.
contend regarding
Replaces "assert" with "contend" and "of" with "regarding", which presents a more argumentative perspective.
maintain concerning
Substitutes "assert" with "maintain" and "of" with "concerning", which indicates a sustained belief or assertion.
attest to
Uses "attest" which means to provide or serve as clear evidence of. Differs from the focus on the claim itself that is present in "assert".
profess about
Replaces "assert" with "profess" and "of" with "about", adding an element of personal belief or avowal.
FAQs
How can I correctly use "assert" in a sentence?
Use "assert" followed by a direct object (e.g., "He asserted his innocence") or a "that" clause (e.g., "He asserted that he was innocent"). Avoid using "assert of."
What are some alternatives to using "assert"?
Which is the correct preposition to use after "assert," "of" or "about"?
"Assert" is not typically followed by "of". "Assert about" can be used to specify the topic. The proper use depends on constructing the sentence to include a direct object or "that" clause after "assert".
What's the difference between "assert that" and "assert something"?
"Assert that" introduces a clause expressing the content of the assertion (e.g., "He asserted that the Earth is round"). "Assert something" uses a direct object, specifying what is being asserted (e.g., "He asserted his rights").
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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
85%
Authority and reliability
1.8/5
Expert rating
Real-world application tested