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Justyna Jupowicz-Kozak

CEO of Professional Science Editing for Scientists @ prosciediting.com

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as a proof of

Grammar usage guide and real-world examples

USAGE SUMMARY

The phrase "as a proof of" is not correct in standard written English; the correct form is "as proof of." You can use it when you want to indicate that something serves as evidence or verification of a claim or statement.
Example: "She presented her diploma as proof of her qualifications for the job."

⚠ May contain grammatical issues

Science

News & Media

Academia

Human-verified examples from authoritative sources

Exact Expressions

45 human-written examples

Dr. Brewer sees it as a proof of principle.

News & Media

The New York Times

Still, the experiment became known as a proof of principle.

As a proof of concepts, samples of human EA.

Several simulation examples are presented as a proof of concept.

We have assigned a universal citation to the first few states as a proof of concept.

Jibo is released as a proof of concept on youtube TechCrunch.

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Human-verified similar examples from authoritative sources

Similar Expressions

15 human-written examples

Valproic acid (VPA) is highlighted as a proof-of-principle.

As a proof-of-concept experiment, Sabatini tested two drugs.

As a proof-of-concept, blanket wash solvents are designed.

This is an experimental module, provided mostly as a proof-of-concept.

But as a proof-of-concept, it's not bad.

News & Media

TechCrunch
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Expert writing Tips

Best practice

When aiming for formal writing, consider alternatives like "as evidence of" or "serving as proof of".

Common error

Avoid using the indefinite article "a" before "proof". The grammatically correct form is "as proof of".

Antonio Rotolo, PhD - Digital Humanist | Computational Linguist | CEO @Ludwig.guru

Antonio Rotolo, PhD

Digital Humanist | Computational Linguist | CEO @Ludwig.guru

Source & Trust

85%

Authority and reliability

3.8/5

Expert rating

Real-world application tested

Linguistic Context

The phrase functions as a prepositional phrase indicating the purpose or reason for something. While Ludwig identifies it frequently, note that it is grammatically incorrect. The correct usage is without the article 'a', as in "as proof of".

Expression frequency: Very common

Frequent in

Science

45%

News & Media

28%

Academia

27%

Less common in

Formal & Business

0%

Wiki

0%

Reference

0%

Ludwig's WRAP-UP

The phrase "as a proof of" is a very common phrase used to indicate that something serves as evidence or verification. However, Ludwig AI identifies it as grammatically incorrect; the proper form is "as proof of". Despite its frequent use across scientific, academic, and news contexts, it's crucial to avoid the article "a" for grammatical accuracy. Alternatives such as "as evidence of" or "serving as proof of" may be considered, especially in formal writing.

FAQs

Is it grammatically correct to say "as a proof of"?

No, the grammatically correct form is "as proof of". The inclusion of the article "a" is considered incorrect in this context. You might also consider alternatives such as "as evidence of".

What does "as proof of" mean?

The phrase "as proof of" indicates that something serves as evidence or verification of a claim or statement. It signifies that what follows is meant to demonstrate the truth or validity of something.

Can I use "as a proof of" in formal writing?

While "as a proof of" is frequently used, it's grammatically incorrect. For formal writing, it's advisable to use "as proof of" or alternative phrases like "as evidence of", "serving as proof of", or "in confirmation of".

What are some alternatives to "as proof of"?

Some alternatives include "as evidence of", "as a demonstration of", "serving as proof of", and "confirming". The best choice depends on the specific context and desired level of formality.

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Most frequent sentences: