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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
substantially identical to
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "substantially identical to" is correct and usable in written English.
It can be used in contexts where you want to indicate that two items, concepts, or entities are very similar or nearly the same in significant ways. Example: "The two products are substantially identical to each other in terms of features and performance."
✓ 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
15 human-written examples
One maneuver, though much more restricted than it once was, involves selling borrowed securities substantially identical to those already held.
News & Media
According to WWD, it will cover, "deliberate copies that are substantially identical to the protected designs" for three years.
News & Media
The system advocated by him, and soon thereafter adopted by most leading chemists, is substantially identical to what is still used today.
Encyclopedias
In the other cases, he said: "We're adopting a cautious approach because the answer depends on individual facts and circumstances to define whether the replacement property is substantially identical to the property that is sold.
News & Media
More dramatically, the draft declaration proposes amending the human rights convention to make a case inadmissible if the claim was substantially identical to a question that had already been considered by a national court.
News & Media
One of the biggest changes in the new bill is that designers would have to prove that a copy is "substantially identical" to their originals, rather than "substantially similar".
News & Media
Human-verified similar examples from authoritative sources
Similar Expressions
42 human-written examples
It was also found that any flow regime was substantially identical at different radial positions across the column.
Science
Eventually it was discovered that common flypaper at the time contained arsenic, and that by soaking the flypaper in water, a solution substantially identical – including the same adulterants – to that found in a bottle at the Higgins residence could be obtained.
Wiki
The composition and organization of genes within the mtDNAs of all dermatophytes analyzed was found to be substantially identical, reinforcing the view that dermatophytes are closely related and constitute a highly conserved lineage of filamentous fungi.
Science
Over 100 substantially identical emails were received stating an opposition to the continued inclusion of evolution in the proposed standards, characterizing evolution as a theory and not a fact.
(Because of the Internal Revenue Service's wash-sale rule, you cannot buy back the same stock or substantially identical securities for 30 days and expect to claim a loss on that stock).
News & Media
Expert writing Tips
Best practice
When using "substantially identical to" in legal or technical contexts, ensure you can justify the use of 'substantially' rather than 'exactly' identical. What specific deviations or allowances are being accounted for by using "substantially"?
Common error
Avoid using "substantially identical to" when there are clear and significant differences between the items being compared. If the differences are notable, consider using phrases like "similar to" or "related to" instead.
Source & Trust
84%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "substantially identical to" functions as a modifier specifying the degree to which something is the same as something else. It softens the claim of exact sameness, acknowledging minor discrepancies, as seen in Ludwig's examples, particularly within legal and scientific discourse.
Frequent in
News & Media
31%
Science
31%
Encyclopedias
9%
Less common in
Wiki
6%
Formal & Business
6%
Ludwig's WRAP-UP
The phrase "substantially identical to" is a valuable tool for expressing a high degree of similarity while acknowledging the possibility of minor differences. As Ludwig AI indicates, it's grammatically sound and appears frequently in news, science, and encyclopedia sources. It's often used in legal, technical, and business writing to make careful comparisons. When using this phrase, it's essential to be aware of the specific context and the degree of similarity you want to convey and ask yourself what nuances change by using 'substantially' instead of 'exactly'. This approach ensures clarity and accuracy in your writing.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
virtually the same as
Emphasizes near-perfect similarity, potentially implying only negligible differences.
almost indistinguishable from
Highlights the difficulty in discerning any differences between the items being compared.
essentially equivalent to
Focuses on the functional equivalence despite possible superficial differences.
nearly equivalent to
Indicates a close level of equivalence without being exactly the same.
for all intents and purposes, the same as
Implies that any minor differences are inconsequential in practice.
broadly analogous to
Suggests a strong resemblance or parallel, but not necessarily a direct match.
much the same as
A more informal way of expressing substantial similarity.
closely resembles
Highlights the visual similarity.
bears a strong resemblance to
Emphasizes a pronounced similarity, although not necessarily complete identity.
comparable to
Points out that the objects are very similar and can be easily compared.
FAQs
How can I use "substantially identical to" in a sentence?
You can use "substantially identical to" to describe items or concepts that are very similar but not perfectly the same. For example, "The copy was "substantially identical to" the original design."
What's the difference between "substantially identical to" and "identical to"?
"Identical to" means exactly the same, while "substantially identical to" implies a high degree of similarity but allows for minor differences. It's often used when complete uniformity isn't required or provable.
What can I say instead of "substantially identical to"?
You can use alternatives like "virtually the same as", "essentially equivalent to", or "nearly identical to" depending on the context.
In which contexts is the phrase "substantially identical to" commonly used?
The phrase "substantially identical to" is commonly used in legal, scientific, and business contexts where precise comparisons are necessary but minor variations might exist or are permissible.
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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
4.5/5
Expert rating
Real-world application tested