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Justyna Jupowicz-Kozak

CEO of Professional Science Editing for Scientists @ prosciediting.com

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reason for why

Grammar usage guide and real-world examples

USAGE SUMMARY

The phrase "reason for why" is not considered correct in standard written English.
It is generally used when explaining the cause or justification for something, but it is redundant and can be simplified. Example: "The reason for why we chose this method is due to its efficiency."

⚠ May contain grammatical issues

News & Media

Science

Academia

Wiki

Human-verified examples from authoritative sources

Exact Expressions

60 human-written examples

Speaking about it puts the very reason for why we are here in doubt.

News & Media

The New York Times

One thing you won't find, though, is a good reason for why we hiccup.

These results imply that the allocative efficiency hypothesis may not be the primary reason for why schooling impacts health outcomes.

And that's the reason for why the other vision did not materialise.

News & Media

The Guardian

These results suggest a reason for why DSA shows a higher chlorine selectivity than RuO2 and propose an experimental test of the hypothesis.

However, the prevailing paradigm of somatic evolution and multi-step tumorigenesis, while useful in many instances, offers no logically coherent reason for why oncogenesis recapitulates ontogenesis.

The mechanisms of damping and the reason for why it is not possible to estimate damping with respect to the material properties are discussed.

Everyone who works in the theatre will give a different reason for why they fell in love with it.

News & Media

The Guardian

The White House has given no sensible reason for why Mr. Bush is unwilling to appear alone.

News & Media

The New York Times

"We haven't been given a reason for why this has happened beyond that the arts council has demanded it.

News & Media

The Guardian

If you find there's a reason for why they're acting the way they are, offer to help.

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Expert writing Tips

Best practice

When seeking clarity, prefer using "reason why", "reason that", or "explanation for" over the grammatically awkward "reason for why".

Common error

Do not use "reason for why" as it's redundant. The word "why" already implies "for what reason", making the "for" unnecessary. Instead, choose "reason why" or restructure your sentence.

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

Antonio Rotolo, PhD

Digital Humanist | Computational Linguist | CEO @Ludwig.guru

Source & Trust

81%

Authority and reliability

3.8/5

Expert rating

Real-world application tested

Linguistic Context

The phrase "reason for why" functions as a noun phrase intended to identify the cause or explanation behind something. However, it's grammatically redundant. Examples from Ludwig show its usage across various contexts despite this redundancy.

Expression frequency: Very common

Frequent in

News & Media

38%

Science

30%

Academia

15%

Less common in

Wiki

10%

Formal & Business

5%

Encyclopedias

2%

Ludwig's WRAP-UP

In summary, while the phrase "reason for why" is frequently used across various sources, Ludwig AI identifies it as grammatically incorrect due to its redundancy. The word "why" already implies a reason, making the "for" unnecessary. To improve clarity and grammatical accuracy, it's recommended to use alternatives such as "reason why", "the reason that", or "explanation for". Although commonly found in news, media, and even academic contexts, its use should be carefully considered in formal writing to maintain a professional tone. By opting for more concise and grammatically sound alternatives, you can express the cause or justification more effectively.

FAQs

What's a more grammatically correct way to say "reason for why"?

You can use "reason why" or "the reason that". Omitting the "for" makes the phrase more concise and grammatically sound.

Is "reason for why" considered acceptable in formal writing?

No, "reason for why" is generally considered grammatically incorrect in formal writing. Opt for alternatives like "explanation for" or "justification for" instead.

Can I use "reason for why" in informal conversations?

While "reason for why" is commonly used, even in informal settings, it's best to use "reason why" for better grammar. The redundancy of "for" is generally discouraged, even informally.

What are some alternatives to "reason for why" that highlight cause and effect?

You can use phrases like "cause for which", which emphasizes the causal relationship, or "rationale behind", focusing on the underlying logic. These alternatives offer a more precise and grammatically correct way to express causality.

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Source & Trust

81%

Authority and reliability

3.8/5

Expert rating

Real-world application tested

Most frequent sentences: