always valid

USAGE SUMMARY

The phrase "always valid" is correct and usable in written English.
It can be used to indicate that something is consistently true or applicable in all situations. Example: "The principle of honesty is always valid in any relationship."

✓ Grammatically correct

Science

Academia

News & Media

Human-verified examples from authoritative sources

Exact Expressions

60 human-written examples

And these are always valid.

Massachusetts Institute of Technology

Because of this, the conclusions reached were not always valid.

Nurse Education Today

Yet, with the advent of Parallel Imaging (pMRI), the Rician model is not always valid.

NeuroImage

The colonel's excuses are always valid jokes that hide the passion of a belief.

The Guardian - Books

In this paper, we show that this physical intuition is not always valid.

Journal of Sound and Vibration

The gas remains perfect; its state equation remains always valid, except, it is named in more by calorically imperfect gas.

Advances in Space Research

This assumption is not always valid when dealing with GPS, or taking measures in a short time window.

Biosystems Engineering

"Our constituents' feelings are always valid, but never more than in the run-up to the general election.

The Guardian

The gas remains perfect, its state equation remains always valid, except it will name in more calorically imperfect gas or gas at High Temperature.

Chinese Journal of Aeronautics

The milling tests with different combinations of cutting parameters show that multi-TVD approach is always valid regardless of the parameters being used.

International Journal of Machine Tools and Manufacture

We also show that these bounds are equivalent to the Harnack inequality except for peculiar regions, and are therefore almost always valid.

Journal of Functional Analysis

Expert writing Tips

Best practice

In psychological contexts, use the phrase to affirm that emotions are legitimate responses regardless of their factual basis.

Common error

Do not use "always valid" to mean something is 'always a good idea' in a casual sense. In technical writing, validity refers to the internal logic of an argument or a model, not necessarily the real-world outcome.

Linguistic Context

The phrase "always valid" functions primarily as a predicate adjective phrase. It consists of the frequency adverb "always" modifying the adjective "valid". In scientific and mathematical discourse, as seen in Ludwig AI examples from MIT and ScienceDirect, it is used to define parameters or equations that hold true under all investigated conditions.

Expression frequency: Very common

Frequent in

Science

65%

Academia

20%

News & Media

10%

Less common in

Encyclopedias

3%

Business

1%

Social Media

1%

Ludwig's WRAP-UP

The phrase "always valid" is a powerful linguistic tool used to denote absolute consistency. Ludwig AI data reveals that it is most prevalent in scientific research, particularly in mathematics and physics where it describes equations that function without approximation. Beyond the lab, it has found a modern home in psychology and social commentary, where it serves to validate human experience. Whether you are proving a theorem or supporting a friend, "always valid" provides a robust, unambiguous way to declare that something is beyond dispute or dismissal. It is grammatically sound, formal in tone and universally understood.

More alternative expressions

Phrases that express similar concepts, ordered by semantic similarity:

invariably correct

Implies a lack of variation or exception.

consistently true

Focuses on the factual accuracy of a statement over time.

unconditionally sound

Specifies that the validity does not depend on any external factors.

universally applicable

Emphasizes that the concept can be applied in any situation or context.

permanently effective

Shifts the focus from logical truth to practical utility.

constantly legitimate

Used more in legal or procedural contexts.

perennially relevant

Suggests something that stays important across different eras.

strictly accurate

Focuses on the precision and rigort of the statement.

infinitely robust

Common in engineering or software to describe a state that never fails.

everlasting

Adds a more poetic or temporal dimension to the duration of validity.

FAQs

How to use "always valid" in a sentence?

You can use it to describe a rule or state, such as: "The physical law is <a href="/s/always+valid" target="_blank" rel="alternative">always valid regardless of the observer's speed."

What can I say instead of "always valid"?

Depending on the context, you can use "<a href="/s/consistently+true" target="_blank" rel="alternative">consistently true", "<a href="/s/universally+applicable" target="_blank" rel="alternative">universally applicable" or "<a href="/s/invariably+correct" target="_blank" rel="alternative">invariably correct".

Is "always valid" too informal for scientific papers?

No, it is highly appropriate. Ludwig shows numerous examples from journals like ScienceDirect where researchers state that an equation or assumption is <a href="/s/always+valid" target="_blank" rel="alternative">always valid.

What is the difference between "always valid" and "always true"?

While often interchangeable, "<a href="/s/always+true" target="_blank" rel="alternative">always true" refers to factual accuracy, whereas "always valid" often refers to the legitimacy of a process, logic or an emotional state.