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
deduced that
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "deduced that" is correct and usable in written English.
It can be used when you want to express a conclusion or inference drawn from evidence or reasoning. Example: "After analyzing the data, she deduced that the experiment had been a success."
✓ Grammatically correct
News & Media
Science
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
51 human-written examples
Surely not even the great detective himself could have deduced that was going to happen.
News & Media
Exccept for to the direction that the teams are playing but you'd already deduced that.
News & Media
He deduced that instead of one continuous population of cod that moved, there seemed to be several sub-populations.
News & Media
We deduced that A. reniforme var.
Science
He deduced that Reyes needed a cleaner swing.
News & Media
Applebaum also deduced that West had two hearts.
News & Media
Human-verified similar examples from authoritative sources
Similar Expressions
9 human-written examples
we deduce that is continuous.
We can deduce that (3.4).
Hence, we deduce that ∥ A x ∥ ≤ ρ.
If we deduce that is completely continuous.
It is easy to deduce that (1.6).
Expert writing Tips
Best practice
Use "deduced that" when you want to emphasize a conclusion reached through careful observation and logical reasoning. It's particularly effective when highlighting a step-by-step thought process.
Common error
Avoid using "deduced that" in situations where a simpler word like "thought" or "believed" would suffice. Overusing it can make your writing sound unnecessarily formal or pretentious. Reserve it for instances where genuine deduction is involved.
Source & Trust
85%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "deduced that" functions as a reporting verb phrase, introducing a clause that expresses a conclusion or inference drawn from evidence or reasoning. Examples in Ludwig show its use in various contexts, indicating a thought process leading to a particular understanding.
Frequent in
News & Media
57%
Science
28%
Encyclopedias
6%
Less common in
Wiki
1%
Academia
1%
Formal & Business
0%
Ludwig's WRAP-UP
In summary, "deduced that" is a grammatically sound and frequently used phrase to express a conclusion reached through reasoning. Ludwig's analysis of numerous examples confirms its presence in varied contexts, particularly news, science, and encyclopedia sources. Its formality is generally neutral, but leans toward a more considered tone, making it suitable when showcasing a thought process. Remember, while "deduced that" is effective, simpler alternatives like "concluded that" or "inferred that" may be more appropriate in less formal situations. Be mindful of overuse to keep your writing clear and engaging.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
concluded that
Emphasizes reaching a final judgment or decision after considering all the facts.
inferred that
Highlights the process of drawing a conclusion from evidence and reasoning.
determined that
Suggests a more formal or investigative process leading to a firm conclusion.
reasoned that
Focuses on the logical steps taken to arrive at a specific understanding.
surmised that
Implies a conclusion reached with limited evidence; a more speculative inference.
assumed that
Indicates a belief taken for granted, possibly without concrete proof.
hypothesized that
Suggests forming a tentative explanation as a starting point for further investigation.
gathered that
Implies collecting information from various sources to form a general understanding.
understood that
Highlights comprehension or awareness gained through information or experience.
ascertained that
Emphasizes finding something out for certain; discovering something definitively.
FAQs
How can I use "deduced that" in a sentence?
You can use "deduced that" to indicate a conclusion reached through reasoning or observation. For example: "After analyzing the evidence, the detective "deduced that" the suspect was lying."
What's a simpler alternative to "deduced that"?
Depending on the context, you can use simpler alternatives like "concluded that", "inferred that", or "figured out that".
Is it always necessary to use "that" after "deduced"?
While not always grammatically required, including "that" after "deduced" often improves clarity and flow, especially in more complex sentences. Omitting it can sometimes sound less formal.
What is the difference between "deduced that" and "assumed that"?
"Deduced that" implies a conclusion based on evidence and logical reasoning, whereas "assumed that" suggests a belief taken for granted, possibly without concrete proof. Deduction involves a more rigorous process of inference.
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
85%
Authority and reliability
4.5/5
Expert rating
Real-world application tested