must be observable

USAGE SUMMARY

The phrase "must be observable" is correct and usable in written English.
It can be used when discussing criteria or requirements that need to be visible or detectable in some way. Example: "For the experiment to be valid, all variables must be observable to ensure accurate results."

✓ Grammatically correct

Science

News & Media

Encyclopedias

Human-verified examples from authoritative sources

Exact Expressions

5 human-written examples

All usability metrics must be observable and quantifiable.

Measuring the User Experience Collecting, Analyzing, and Presenting Usability Metrics

Controllable and disturbance dynamics must be observable from the plant measurements.

ISA Transactions

For this particular case, X-ray acquisition is a necessity, as all skeletal landmarks of interest must be observable.

EURASIP Journal on Image and Video Processing

In places where personal interaction is absolutely essential and facial gestures must be observable, e.g. as a psychologist or counsellor, at the airport or in a bank, no form of face obfuscation can be allowed.

Huffington Post

Noether's theorem provides a test for theoretical models of the phenomenon: if the theory has a continuous symmetry, then Noether's theorem guarantees that the theory has a conserved quantity, and for the theory to be correct, this conservation must be observable in experiments.

Wikipedia

Human-verified similar examples from authoritative sources

Similar Expressions

55 human-written examples

It must also be observable in the example we set by ensuring there is a reckoning for our own violations, when and wherever they occur, and especially when they involve the barbarity of torture.

The Guardian - Opinion

COSY data detect 2JH-H and 3JH-H correlations and hence show correlations between geminal protons (protons attached to the same carbon) and protons attached to adjacent carbons (note: in order to be observable, geminal protons must be magnetically inequivalent).

Geochemical Transactions

Moreover, the insolvency administrator's preferences represented by u and r have to be observable and a verifiable and unbiased estimator of the continuation value must be available.

Business Research

Second, for an interference pattern to be observable over any extended period of time, the two sources of light must be coherent with respect to each other.

Encyclopedia Britannica

Such abstract properties or attributes as intelligence or introversion never are directly measured but must be inferred from observable behaviour.

Encyclopedia Britannica

Changing Direction In a Scholarly Battle This led him to fight in the ranks of the so-called logical positivists, or those like his European friends A. J. Ayer and Rudolf Carnap, who asserted that all statements of truth must be based on observable data.

The New York Times - Arts

Expert writing Tips

Best practice

When using "must be observable", ensure that the context clearly defines the method or means by which the observation should occur. Providing this clarity strengthens the statement and avoids ambiguity.

Common error

Avoid using "must be observable" when the phenomenon in question is inherently abstract or difficult to directly observe. Instead, consider phrases like "should be inferable" or "can be indirectly measured" to reflect the true nature of the subject.

Linguistic Context

The phrase "must be observable" functions as a modal phrase that expresses a requirement or necessity for something to be detectable or perceivable. As Ludwig AI explains, the phrase is usable in written English, often specifying a criteria or condition.

Expression frequency: Rare

Frequent in

Science

60%

News & Media

20%

Encyclopedias

20%

Less common in

Formal & Business

0%

Wiki

0%

Reference

0%

Ludwig's WRAP-UP

In summary, "must be observable" is a phrase used to express a strict requirement for something to be detectable or perceivable, primarily in formal and scientific contexts. As Ludwig AI confirms, the phrase is grammatically sound and best used when emphasizing the necessity of empirical evidence or direct observation. Alternative phrases like "should be detectable" or "needs to be visible" can be used to convey similar meanings with varying degrees of emphasis. When using this phrase, clarity in the method of observation is crucial. The phrase appears infrequently, making it a somewhat rare but impactful expression.

More alternative expressions

Phrases that express similar concepts, ordered by semantic similarity:

must be discernible

Uses discernible, emphasizing the ability to perceive or distinguish something.

should be detectable

Changes "must" to "should", softening the obligation.

needs to be visible

Replaces "observable" with "visible", focusing on visual detection and "must" with "needs" to show requirement.

has to be measurable

Substitutes "observable" with "measurable", highlighting quantifiable detection and "must" with "has to".

needs to be apparent

Uses apparent, focusing on clear visibility or understanding.

is required to be noticeable

Emphasizes the necessity of something being easily noticed or apparent.

is vital to be detectable

Stresses the importance of being able to detect something and replaces "must" with "is vital".

ought to be perceptible

Uses "ought to" for a weaker obligation and "perceptible" as a formal synonym for observable.

should be ascertainable

Indicates that something should be able to be found out for certain.

is essential to be identifiable

Highlights that identifying something is critical and replaces "observable" with "identifiable".

FAQs

How can I use "must be observable" in a sentence?

Use "must be observable" to describe a requirement for something to be detectable or visible. For example, "All usability metrics "must be observable" and quantifiable."

What are some alternatives to "must be observable"?

Alternatives include "should be detectable", "needs to be visible", or "has to be measurable", depending on the specific context.

When is it appropriate to use "must be observable"?

It's appropriate when emphasizing the necessity of direct observation or detection. For example, in scientific experiments, the results "must be observable" to validate a hypothesis.

Is "must be observable" the same as "should be observable"?

No, "must" indicates a strict requirement, while "should" suggests a recommendation. "Must be observable" conveys a higher degree of necessity than "should be observable".