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
they are therefore
Grammar usage guide and real-world examplesUSAGE SUMMARY
"they are therefore" is a correct and usable part of a sentence in written English.
You can use it when you want to express a logical conclusion that follows from previously stated facts. For example: "The students failed to complete the assignment, they are therefore not allowed to take the test."
✓ Grammatically correct
News & Media
Science
Encyclopedias
Alternative expressions(20)
they are back
these individuals are known as
they are named
they are required
they are called
they are categorized
they are caught
they go by the names of
they are hailed
their names are
consequently they are
they are labeled
they go by the name of
as a result they are
they are then
they are is asking
they are identified as
they are constituted
they are known as
they are referred to as
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
They are therefore all included.
Encyclopedias
They are, therefore, worthless financially".
News & Media
They are, therefore they think.
News & Media
They are, therefore, equally bright.
News & Media
They are therefore strong pillars.
News & Media
They are therefore looking at other options".
News & Media
"They are therefore unwittingly buying unhealthy products.
News & Media
They are, therefore, the perfect customers.
News & Media
"They are therefore foreboding harbingers of the future".
News & Media
And they are therefore fiercely proud of their efforts.
News & Media
They are therefore also of interest to this column.
News & Media
Expert writing Tips
Best practice
Use "they are therefore" to clearly and logically connect a premise with its conclusion. Ensure the relationship between the two parts is evident and unambiguous.
Common error
Avoid using "they are therefore" when the connection between the antecedent and the consequence is weak or unclear. Ensure a strong, logical link exists to avoid confusing the reader.
Source & Trust
85%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "they are therefore" functions as a conjunctive adverbial phrase, connecting two clauses where the second clause is a logical consequence of the first. Ludwig provides numerous examples demonstrating this use.
Frequent in
Science
31%
News & Media
57%
Encyclopedias
2%
Less common in
Formal & Business
0%
Wiki
2%
Social Media
0%
Ludwig's WRAP-UP
The phrase "they are therefore" serves as a connector, indicating a logical consequence or result. As Ludwig AI confirms, it is grammatically correct and widely used, particularly in news, media, and scientific writing. The phrase functions to bridge two ideas, showing that one is a direct outcome of the other. When using this phrase, ensure the logical connection is clear to maintain coherence. While alternatives such as "consequently" or "as a result" exist, "they are therefore" maintains a unique function in explicitly presenting a deduction. This is common to most of the reputable sources.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
consequently, they are
This alternative reverses the order, emphasizing the result first. Slightly more formal.
as a result, they are
Focuses on the outcome or effect, providing a direct link between cause and effect.
hence, they are
A more concise and slightly more formal way to indicate a logical consequence.
thus, they are
Similar to 'hence' but slightly more common and less formal.
accordingly, they are
Emphasizes the action taken in response to a previous statement.
for this reason, they are
Highlights the specific cause or justification leading to the conclusion.
it follows that they are
A more formal and explicit way to express a logical deduction.
because of this, they are
Clearly indicates a causal relationship, emphasizing the cause.
that's why they are
An informal alternative emphasizing the reason for a particular state or action.
in consequence, they are
A more formal way to indicate that something is a result or effect of something else.
FAQs
How to use "they are therefore" in a sentence?
Use "they are therefore" to show a direct consequence or logical conclusion based on previous information. For example, "The data is consistent, they are therefore reliable."
What can I say instead of "they are therefore"?
You can use alternatives like "consequently they are", "as a result they are", or "thus they are" to express a similar logical relationship.
Which is correct, "they are therefore" or "therefore they are"?
"They are therefore" is generally preferred in formal writing, placing emphasis on the subjects. "Therefore they are" might be used for stylistic variation but is less common.
What's the difference between "they are therefore" and "they are because"?
"They are therefore" indicates a conclusion or consequence. "They are because" introduces a reason or cause. For instance, "They are valuable; they are therefore kept safe" vs. "They are kept safe; they are because they are valuable".
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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
4.5/5
Expert rating
Real-world application tested