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
on what foundation
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "on what foundation" is correct and usable in written English.
It can be used when questioning the basis or reasoning behind a belief, argument, or decision. Example: "Before we proceed, I need to understand on what foundation you are making these claims."
✓ Grammatically correct
News & Media
Science
Wiki
Alternative expressions(20)
on what infrastructure
on what platform
what is the justification
what's the justification
on what based
what is the rationale
on what purpose
on what connection
what is the explanation
on what reason
on what ground
what's the reason
on what base
on what criterion
on what evidence
what is the foundation
upon what authority
on what standard
on what grounds
by what rationale
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
1 human-written examples
But then on what foundation are these conflicting ideas developed?
News & Media
Human-verified similar examples from authoritative sources
Similar Expressions
56 human-written examples
Many arts organizations in New York and California -- states that together received about 30percentt of what foundations spent on the arts in 2001 -- say that they are now receiving less from these sources.
News & Media
What foundation and concealer do you use?
News & Media
"Gotham," I said in City Room on Oct. 28, based on what the memorial foundation told me and on the evidence that met my eye.
News & Media
In fact, the initial Bootstrap push had direct lines of code and copy taken from ZURB's work on what today is Foundation 1.0".
News & Media
The Soviet Union said the coup "demonstrated once again on what a rotten foundation Washington's policy in South Vietnam is based".
Wiki
Given these contextual issues, we were faced with an important set of questions: on what sorts of foundations should teaching and learning about public health ethics be based?
Science
But at this point his recordings have converged on what they share: a foundation of four-chord 1960s rock that he floods with echoes, reverb and background noise, competing with his voice and instruments.
News & Media
After two years of responding to the economic crisis he inherited, Mr. Obama starts the second half of his term managing the slow recovery and building on what he calls a "foundation" for growth.
News & Media
"Now we've spent a year going through and making sure we reset the foundation on what we're executing and what our priorities are, we have a lot more confidence that we can move a lot faster on bigger things".
News & Media
This weekend, I read an old (1993) but excellent study commissioned by the Casey foundation on what it takes comprehensive school reform in large school systems.
News & Media
Expert writing Tips
Best practice
Use "on what foundation" when you want to inquire about the fundamental principles or rationale behind an argument, belief, or system. It invites a deeper examination of the underlying assumptions.
Common error
While "on what foundation" and "on what basis" are similar, "foundation" implies a more structural or fundamental underpinning, whereas "basis" can refer to a wider range of justifications. Use "foundation" when you want to emphasize the core principles.
Source & Trust
83%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "on what foundation" functions as an interrogative prepositional phrase. It introduces a question that seeks to understand the underlying support or fundamental basis for a claim, argument, or idea. Ludwig AI shows this phrase appears in diverse contexts, ranging from books to articles.
Frequent in
News & Media
40%
Science
30%
Formal & Business
10%
Less common in
Wiki
10%
Encyclopedias
5%
Reference
5%
Ludwig's WRAP-UP
In summary, the phrase "on what foundation" serves as a grammatically sound interrogative phrase used to question the fundamental basis of an idea or argument. While less frequent than alternatives such as "on what basis", it maintains a formal tone appropriate for analytical and academic contexts. As confirmed by Ludwig AI, it is usable in written English and serves to invite a deeper examination of underlying assumptions. While other alternatives exist for the phrase, the nuance of "foundation" suggests a more fundamental structure or principle.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
on what basis
Replaces "foundation" with "basis", emphasizing the underlying reason or justification.
on what grounds
Substitutes "foundation" with "grounds", focusing on the reasons or justification for a belief or action.
based on what principle
Highlights the guiding principle or rule that something is built upon.
upon what premise
Focuses on the initial assumption or proposition that something is based on.
what is the rationale
Shifts the focus to the reasoning or logic behind something.
what is the justification
Emphasizes the act of showing something to be right or reasonable.
what supports this
Simplifies the phrase to ask directly for the evidence or support.
what is the underlying reason
Focuses on the fundamental cause or motive.
from what source does this stem
Emphasizes the origin or starting point of something.
where does this originate
Focuses on the place or situation from which something begins or arises.
FAQs
How can I use "on what foundation" in a sentence?
You can use "on what foundation" to inquire about the underlying principles or rationale behind something. For example, "On what foundation are these claims based?"
What is a good alternative to "on what foundation"?
Alternatives include "on what basis", "on what grounds", or what is the rationale?
Is "on what foundation" formal or informal?
"On what foundation" is generally considered formal and suitable for academic, professional, or analytical contexts.
What's the difference between "on what foundation" and "what is the basis for"?
"On what foundation" emphasizes the fundamental principles, while "what is the basis for" is a more general inquiry about the reasons or justifications.
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
83%
Authority and reliability
4.5/5
Expert rating
Real-world application tested