is then not

USAGE SUMMARY

The phrase "is then not" is correct and usable in written English.
It can be used to indicate a negation or contradiction in a statement, often in a more formal or literary context. Example: "If the hypothesis is proven false, it is then not valid for our research."

✓ Grammatically correct

Science

News & Media

Encyclopedias

Human-verified examples from authoritative sources

Exact Expressions

60 human-written examples

This cost basis is then not considered part of the proceeds taxed as income.

The New York Times

It is, then, not obvious what Labour has to do to win back power.

The Guardian - Opinion

It is then not fair to Rachel to ask her to race again three weeks later".

The New York Times - Sports

Killing adults is then not enough; future generations of the enemy — their children — must also be eliminated.

The New Yorker

A disease is a medical condition that develops outside of our control; it is, then, not a matter of choice.

The New York Times

The stress is then not easily relieved, and types of dislocation motion that are characteristic of the fatigue process initiate a crack at the weld surface.

Encyclopedia Britannica

At a given temperature T, there is then not enough thermal energy available to create and emit many large radiation quanta hν.

Encyclopedia Britannica

To keep a person in custody for more than 28 days who is then not charged, or is charged and then found not guilty?

The Guardian

He was 91, but still – as with everyone who has always been in your life and is then not there any more – his death seems impossible.

The Guardian - Books

The problem of understanding Blunt is, then, not just a question of context, but also of an individual temperament caught in a mounting horror of consequences.

The Guardian - Books

A catastrophic loss of equilibrium stability is then not excluded.

Journal of Sound and Vibration

Expert writing Tips

Best practice

Use "is then not" to clearly indicate a logical consequence or a condition under which something is not true. It's particularly effective in formal writing and when presenting arguments or deductions.

Common error

Avoid using "is then not" in casual conversation or informal writing where simpler alternatives like "isn't" or "is not" would be more appropriate. The phrase can sound overly formal or stilted in everyday contexts.

Linguistic Context

The phrase "is then not" functions as a conjunction phrase indicating negation as a logical consequence. According to Ludwig, it serves to negate a statement based on a preceding condition or argument. It emphasizes that something does not hold true given a certain premise.

Expression frequency: Very common

Frequent in

Science

55%

News & Media

25%

Encyclopedias

10%

Less common in

Wiki

5%

Formal & Business

3%

Reference

2%

Ludwig's WRAP-UP

In summary, the phrase "is then not" functions as a conjunction phrase indicating negation as a logical consequence, frequently found in formal and scientific writing. Ludwig confirms its role in clarifying that something is invalid based on a previously stated condition. While grammatically correct and commonly used, it is important to consider the context; simpler alternatives may be more appropriate in informal settings. The analysis indicates that "is then not" is best suited for precise, logical arguments in settings that benefit from formal language.

More alternative expressions

Phrases that express similar concepts, ordered by semantic similarity:

is therefore not

Replaces "then" with "therefore", indicating a direct consequence or logical conclusion.

is consequently not

Similar to "therefore", emphasizing the result of a preceding action or condition.

is as a result not

Directly links the lack of something to a previous cause or event.

is subsequently not

Implies a chronological sequence where something does not occur after a specific event.

is in that case not

Adds a conditional element, specifying the circumstances under which something is not true.

is accordingly not

Indicates that something is not the case in a way that is fitting or suitable to the circumstances.

is under those circumstances not

Specifically conditions the negation based on the stated circumstances.

is by extension not

Suggests that something does not apply when the idea is broadened or generalized.

is on that account not

Indicates that something is not the case due to a particular reason or consideration.

is necessarily not

Emphasizes that something is not required or guaranteed to be true.

FAQs

How can I effectively use "is then not" in a sentence?

Use "is then not" to express a negation that follows logically from a previous statement. For example, "If the experiment fails, the hypothesis "is then not" supported."

What phrases are similar in meaning to "is then not"?

Alternatives include "is therefore not", "is consequently not", or simply "is not", depending on the context and desired level of formality.

Is "is then not" always the best choice for expressing negation?

No, "is then not" is often more formal. In casual contexts, "isn't" or "is not" may be more suitable. The best choice depends on the tone and audience.

What is the difference between "is then not" and "is not then"?

"Is then not" implies a logical consequence or condition, while "is not then" simply negates something at a specific time. The former emphasizes a relationship between ideas, whereas the latter emphasizes timing. For example, "The report "is then not" reliable (because of these flaws)" versus "The report "is not then" available (it will be later)".