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Justyna Jupowicz-Kozak quote

Justyna Jupowicz-Kozak

CEO of Professional Science Editing for Scientists @ prosciediting.com

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what that

Grammar usage guide and real-world examples

USAGE SUMMARY

The phrase "what that" is not correct and does not convey a clear meaning in written English.
It may be used in informal speech or as part of a larger phrase, but it lacks clarity when isolated. Example: "I don't understand what that means."

⚠ May contain grammatical issues

News & Media

Academia

Human-verified examples from authoritative sources

Exact Expressions

60 human-written examples

"Think what that takes".

News & Media

The New Yorker

Wonder what that means?

News & Media

The New Yorker

That's what that means".

News & Media

Independent

They know what that means.

News & Media

The New York Times

I saw what that took.

You know what that does?

News & Media

Independent

Everyone knows what that means.

Students wondered what that meant.

News & Media

The New Yorker

You know what that meant?

News & Media

The New Yorker

That's basically what that is".

Rondo understood what that meant.

News & Media

Independent
Show more...

Expert writing Tips

Best practice

When encountering "what that" in writing, consider it as a signal to rephrase for clarity. Aim for specific language to avoid ambiguity.

Common error

Avoid using "what that" as a standalone phrase; it often confuses readers. Instead, clarify the sentence to include a clear subject and verb, such as "what that refers to" or "what it signifies."

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

Antonio Rotolo, PhD

Digital Humanist | Computational Linguist | CEO @Ludwig.guru

Source & Trust

91%

Authority and reliability

2.8/5

Expert rating

Real-world application tested

Linguistic Context

The phrase "what that" functions as an interrogative fragment, often serving as an incomplete question seeking clarification or explanation. As Ludwig AI reports, it's grammatically incorrect and benefits from being replaced by phrases that provide more grammatical clarity. The examples often show a speaker trying to understand something previously mentioned.

Expression frequency: Very common

Frequent in

News & Media

50%

Academia

25%

Science

25%

Less common in

Formal & Business

0%

Wiki

0%

Encyclopedias

0%

Ludwig's WRAP-UP

In summary, while the phrase "what that" frequently appears in various sources, including news and media, Ludwig AI identifies it as grammatically incorrect. It serves as an interrogative fragment used to seek clarification. However, to maintain clarity and precision, particularly in formal writing, it's advisable to replace "what that" with grammatically sound alternatives like "what it means" or "what that implies". The abundance of examples found by Ludwig underscores its common usage, yet also highlights the need for careful attention to grammatical correctness in writing.

FAQs

How can I use a grammatically correct alternative to "what that"?

You can replace "what that" with phrases like "what it means", "what that implies", or "what that signifies" depending on the specific context.

Is "what that" considered grammatically correct in English?

No, "what that" is generally considered grammatically incorrect. It lacks a clear structure and often needs to be rephrased for better clarity and understanding.

When is it acceptable to use "what that" in writing or speech?

While "what that" might appear in informal speech, it's best to avoid it in formal writing. Always opt for clearer alternatives such as "what it means" or "what is meant by that" for improved comprehension.

What's the difference between "what that means" and "what it means"?

"What that means" can be vague, while "what it means" is clearer because "it" refers to something specific already mentioned. Using "it" provides a more direct and grammatically sound way to seek clarification.

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Source & Trust

91%

Authority and reliability

2.8/5

Expert rating

Real-world application tested

Most frequent sentences: