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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
observed that
Grammar usage guide and real-world examplesUSAGE SUMMARY
"observed that" is correct and usable in written English.
You can use it when the speaker is making an observation about a situation, or when they are referring to a previous statement. For example: John observed that the room was quite noisy.
✓ Grammatically correct
News & Media
Science
Academia
Alternative expressions(20)
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
"Fractures can be observed that could indicate future landslides".
News & Media
"I've observed that.
News & Media
She observed that although Pres.
News & Media
We observed that F. t.
Science & Research
We observed that nobody remembers everything.
News & Media
"Several people have observed that to me.
News & Media
It is observed that.
Science
Klascius observed that the stores were shuttered.
News & Media
We observed that only 4 compounds viz.
Science & Research
Representative Rodino observed that "drastic methods..
Academia
PUHL: I have never observed that.
Academia
Expert writing Tips
Best practice
Use "observed that" to introduce a factual statement based on direct or indirect evidence. It works best when conveying objectivity and neutrality.
Common error
Avoid using "observed that" in casual conversation or informal writing. Simpler alternatives like "noticed that" or "saw that" are often more appropriate.
Source & Trust
87%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "observed that" functions as a reporting verb, introducing a subordinate clause that conveys an observation or finding. As Ludwig AI confirms, it's suitable for various contexts, framing statements as factual and based on evidence.
Frequent in
News & Media
52%
Science
29%
Academia
12%
Less common in
Formal & Business
3%
Encyclopedias
1%
Wiki
3%
Ludwig's WRAP-UP
In summary, "observed that" is a versatile phrase used to introduce factual statements based on evidence or observation. According to Ludwig AI, it is correct and appropriate for formal writing. The phrase is most commonly found in "News & Media", scientific, and academic contexts, conveying objectivity and authority. While acceptable in various settings, using simpler alternatives like "noted that" may be preferable in informal conversations. The phrase's high frequency and grammatical correctness contribute to its strong expert rating and make it a reliable choice for formal communication.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
noted that
This alternative is less formal than "observed that" and implies a simple recording of information.
stated that
This suggests a formal declaration or announcement.
found that
This is more common in scientific contexts, referring to experimental results.
pointed out that
This suggests drawing attention to a specific detail or fact.
recognized that
This emphasizes acknowledgment of something already known.
discovered that
This suggests uncovering new information.
indicated that
This implies a sign or suggestion, often indirect.
mentioned that
This implies a casual reference rather than a formal observation.
acknowledged that
This implies admitting something, sometimes reluctantly.
realized that
Implies a moment of understanding or awareness.
FAQs
How can I use "observed that" in a sentence?
Use "observed that" to introduce a statement based on observation or evidence, as in "The scientist "observed that" the plants grew faster with more sunlight".
What can I say instead of "observed that"?
You can use alternatives such as "noted that", "pointed out that", or "stated that" depending on the nuance you want to convey.
Is it okay to use "observed that" in informal writing?
While grammatically correct, "observed that" can sound overly formal in casual contexts. Consider using simpler alternatives like "noticed that" or "saw that".
What's the difference between "observed that" and "mentioned that"?
"Observed that" implies a deliberate act of noticing and reporting, while "mentioned that" suggests a more casual and less emphasized reference.
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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
87%
Authority and reliability
4.5/5
Expert rating
Real-world application tested