one must know

USAGE SUMMARY

The phrase "one must know" is correct and usable in written English.
It can be used to express the necessity of knowledge or understanding about a particular subject or situation. Example: "In order to succeed in this field, one must know the fundamental principles of the industry."

✓ Grammatically correct

Science

News & Media

Encyclopedias

Wiki

Formal & Business

Human-verified examples from authoritative sources

Exact Expressions

57 human-written examples

No one must know … I have experienced this first-hand.

The Guardian

No one must know or they'll kill us and destroy the book.' " Over the midday meal, he pondered what to do with the Haggadah.

The New Yorker

But then there cannot be any genuine question about Russell's existence, for just to understand the question one must know the thing to which the name refers.

Encyclopedia Britannica

In order to make a bibliographic search in PubMed-MEDLINE -the most extensive, international and up-dated database in sciences of health - one must know how to handle the MesH (Medical Subjects Headings) terms.

SEMERGEN - Medicina de Familia

However, the approach is of limited predictive value since one must know in advance all the "reactions" involved and be able to measure or predict the equilibrium constants as a function of temperature.

Experimental Thermodynamics

To find the estimated error for a calculated result one must know how to combine the errors in the input quantities.

European Transport Research Review

In order to understand the new trend one must know exactly what makes constitues a "chola".

Huffington Post

The only other crucial piece of information one must know to do the technique correctly is to not 'force' anything.

HuffPost

When working on infection prophylaxis, one must know what SSI rate has to be achieved.

Acta Orthopaedica

Drawing on her flash-bulb metaphor, Pitkin argues that one must know the context in which the concept of representation is placed in order to determine its meaning.

SEP

For one to carry out an intention to deceive oneself one must know what one is doing, to succeed one must be ignorant of this same fact.

SEP

Expert writing Tips

Best practice

When using "one must know", ensure the context clearly indicates what knowledge or understanding is being emphasized. Avoid vague statements and be specific about the subject matter.

Common error

While grammatically correct, "one must know" can sound overly formal or pretentious in casual conversation. Opt for alternatives like "you should know" or "it's important to know" in informal settings.

Linguistic Context

The phrase "one must know" functions as an impersonal construction expressing obligation or necessity of knowledge. Ludwig examples confirm it serves to introduce essential conditions or prerequisites for understanding or success. It is commonly used to convey the importance of having specific knowledge.

Expression frequency: Very common

Frequent in

Science

42%

News & Media

28%

Encyclopedias

11%

Less common in

Wiki

8%

Formal & Business

3%

Academia

0%

Ludwig's WRAP-UP

In summary, "one must know" is a versatile phrase used to highlight the necessity of knowledge across various domains. Ludwig AI confirms the phrase is grammatically correct and frequently used, especially in scientific, news, and encyclopedic contexts. It serves to emphasize the importance of understanding and can be replaced by alternatives such as "it is essential to know" or "it's crucial to understand" depending on the level of formality required. While generally acceptable, it's important to be mindful of the context and avoid overuse in casual settings to maintain a natural tone.

More alternative expressions

Phrases that express similar concepts, ordered by semantic similarity:

it is essential to know

Replaces "one must" with "it is essential", focusing on the importance of knowing.

it is crucial to understand

Substitutes "know" with "understand", emphasizing comprehension rather than just awareness.

it's important to be aware

Uses "important to be aware" instead of "must know", softening the tone while conveying a similar meaning.

knowledge is required

Emphasizes the requirement of knowledge in a more passive and formal way.

understanding is necessary

Focuses on the necessity of understanding, often implying a deeper level of comprehension.

it's imperative to learn

Replaces "know" with "learn", highlighting the process of gaining knowledge.

one needs to be informed

Shifts the focus to being informed, suggesting access to relevant information.

familiarity is needed

Highlights the need for familiarity, often implying a practical understanding.

grasping is vital

Emphasizes the importance of grasping or comprehending something, often implying complexity.

acquaintance is indispensable

Highlights that being acquainted with something is indispensable.

FAQs

How can I use "one must know" in a sentence?

You can use "one must know" to express the necessity of knowledge for a particular situation. For example, "In order to succeed in this field, "one must know" the fundamental principles of the industry."

What are some alternatives to "one must know"?

Alternatives include "it is essential to know", "it is crucial to understand", or "it's important to be aware", depending on the specific context and desired tone.

Is "one must know" formal or informal?

"One must know" leans toward a more formal register. In informal settings, consider using phrases like "you should know" or "it's important to know".

What's the difference between "one must know" and "one should know"?

"One must know" implies a stronger necessity or requirement for knowledge, whereas "one should know" suggests a recommendation or expectation, but with less force.