if and only if required

USAGE SUMMARY

The phrase "if and only if required" is correct and usable in written English.
It is typically used in formal contexts, particularly in logic, mathematics, or legal language, to indicate that a condition is both necessary and sufficient. Example: "The project will proceed if and only if required funding is secured."

✓ Grammatically correct

Science

Human-verified similar examples from authoritative sources

Similar Expressions

60 human-written examples

One difference is that for our problem we need "if and only if" relationships, whereas Gusfield et al. require only one direction of the implication.

Algorithms for Molecular Biology

In two international, multidisciplinary surveys, 95% of researchers reported that they would self-archive if (but only if) required to do so by their institutions or funders.

Plosone

Therefore, neonates were stratified into weight groups as follows: <750 g, no ventilatory support (no IPPV or NCPAP); 750 900 g, NCPAP only if required; 900 1500 g, NCPAP and IPPV if required.

BMC Pediatrics

Consider additional covariates, only if required.

CPT: Pharmacometrics and Systems Pharmacology

A-properties supervene on B-properties if and only if a difference in A-properties requires a difference in B-properties or B-properties orif and only if equivalentlyrify with respect to B-properties guandntees exact similarity with respect tonlypropertifs.

SEP

Claim: \ if and only if \.

Cornell University

A reconstructed signal is acceptable if and only if PRD<9%.

Digital Signal Processing

We show that Ttf=0 holds if and only if f=0.

Journal of Functional Analysis

if and only if.

Journal of Inequalities and Applications

If and, then if and only if.

Journal of Inequalities and Applications

or if and only if.

Journal of Inequalities and Applications

Expert writing Tips

Best practice

Use "if and only if required" to establish a clear, two-way dependency between an action and a requirement. It eliminates ambiguity and ensures that the action occurs precisely when the requirement is met and does not occur otherwise.

Common error

Avoid using "if and only if required" in casual conversation or informal writing. This phrase is best suited for formal settings where precision is essential. In less formal contexts, simpler phrases like "only if necessary" or "when needed" are often more appropriate.

Linguistic Context

The phrase "if and only if required" functions as a conditional connector, establishing a strict equivalence between a condition and a requirement. As supported by Ludwig AI, it clearly indicates that something is both necessary and sufficient.

Expression frequency: Missing

Frequent in

Science

33%

Formal & Business

33%

Academia

34%

Less common in

News & Media

0%

Encyclopedias

0%

Reference

0%

Ludwig's WRAP-UP

In summary, the phrase "if and only if required" serves as a precise conditional connector, commonly used in formal and scientific contexts to establish a strict equivalence between a condition and a requirement. Ludwig AI affirms its grammatical correctness, highlighting its suitability for situations demanding clarity and precision. While examples are limited, alternative phrases like "only if necessary" can be considered in less formal settings. When employing this phrase, ensure it is reserved for situations where you need to explicitly state that a condition is both necessary and sufficient.

More alternative expressions

Phrases that express similar concepts, ordered by semantic similarity:

if absolutely required

Underscores the absolute necessity of the condition for something to occur.

only if necessary

Emphasizes the necessity of the condition, focusing on essential requirements.

only when essential

Focuses on the essential nature of the condition that must be met.

solely if needed

Highlights that the action is dependent on a specific need being present.

subject to requirement

Indicates that something is conditional upon a specific requirement being met.

exclusively if demanded

Stresses that something will happen only when explicitly requested or required.

contingent on necessity

Highlights the dependency on a necessary condition.

conditional upon demand

Similar to 'subject to requirement', but emphasizes the element of demand.

just if it's a must

An informal way of saying something will only happen if absolutely necessary.

precisely if compulsory

Emphasizes the compulsory aspect of the condition.

FAQs

How can I use "if and only if required" in a sentence?

The phrase "if and only if required" is used to specify a condition that is both necessary and sufficient for a particular outcome. For example, "The system will activate if and only if required maintenance is performed."

What does "if and only if required" mean?

It means that a certain action or event will happen precisely when a specific requirement is met, and it will not happen otherwise. It establishes a clear, two-way dependency.

What can I say instead of "if and only if required"?

You can use alternatives like "only if necessary", "solely if needed", or "just if it's a must" depending on the level of formality and the specific context.

Is "if and only if required" grammatically correct?

Yes, "if and only if required" is grammatically correct, but it's more common in formal and technical contexts. Ludwig AI confirms its correctness and usability in written English.