then why not

USAGE SUMMARY

"then why not" is a correct and usable phrase in written English.
You can use it to express agreement or to make a suggestion. For example, "We could go to the beach this weekend, then why not stay for dinner afterward?".

✓ Grammatically correct

News & Media

Academia

Science

Human-verified examples from authoritative sources

Exact Expressions

60 human-written examples

But then why not?

Independent

Then why not?

The New Yorker

But then, why not?

The Washington Post

Then why not shoot fewer?

The Guardian

Then why not Cuba?

The New York Times

"Then why not go out with him?

The New Yorker

Then why not make your own?

Independent

"If people like it, then why not?

The New York Times - Tech

Then why not sell some assets?

The Economist

Then why not simply restyle his hair?

Independent

Oh really, then why not say so?

The Washington Post

Expert writing Tips

Best practice

When using "then why not", ensure the context is clear and that the suggestion is directly related to the preceding point to maintain a logical flow.

Common error

Avoid using "then why not" to introduce a completely unrelated idea or suggestion. This can disrupt the flow of your argument and confuse your reader. Ensure a clear connection between the prior statement and the suggestion introduced by "then why not".

Linguistic Context

The phrase "then why not" functions as an interrogative adverbial phrase used to introduce a suggestion, a counter-argument, or a rhetorical question that logically follows a preceding statement. As Ludwig AI points out, this phrase indicates a reasonableness or obviousness derived from the context. It prompts the listener or reader to consider the presented option or idea.

Expression frequency: Very common

Frequent in

News & Media

55%

Academia

25%

Science

10%

Less common in

Wiki

5%

Formal & Business

3%

Reference

2%

Ludwig's WRAP-UP

In summary, "then why not" is a versatile interrogative adverbial phrase used to introduce a suggestion, counter-argument, or rhetorical question. As per Ludwig AI, this indicates a certain degree of reasonability of the presented solution. Its neutral register makes it suitable for various contexts, though more formal alternatives exist for certain academic or professional settings. The phrase is very common, particularly in News & Media. To use it effectively, ensure a logical connection with the preceding statement to enhance clarity and persuasiveness. Avoid overuse in highly sensitive or formal contexts where a more empathetic or direct approach may be preferred.

More alternative expressions

Phrases that express similar concepts, ordered by semantic similarity:

what's stopping us then

Poses a rhetorical question, highlighting the lack of obstacles.

so why shouldn't we

Rephrases the question to focus on the absence of reasons against something.

why wouldn't we consider it

Expresses the idea as a logical option that ought to be at least pondered.

given that, why shouldn't we

Indicates that a preceding fact makes the suggestion logical or obvious.

why not, in that case

Adds a conditional element, suggesting the action is suitable given the circumstances.

with that being the case, why not

Emphasizes that a specific condition supports the suggestion.

why hesitate then

Implies action should be taken without delay because of preceding information.

why shouldn't that be done

Frames the idea as something that should logically occur, challenging opposition.

under those circumstances, why not

Links the suggestion to a set of circumstances, making it context-dependent.

in that event, why not do it

Suggests action contingent on a specific event occurring.

FAQs

How can I rephrase "then why not" to sound more formal?

In more formal contexts, you could use phrases like "therefore, what is the rationale against", "in that case, why should we not", or "given the circumstances, why not consider". These alternatives provide a similar meaning but with a more elevated tone.

Is "then why not" suitable for academic writing?

"Then why not" can be used sparingly in academic writing, especially when presenting counter-arguments or suggesting alternative approaches. However, ensure the tone remains professional and the suggestion is clearly justified. More formal alternatives might be preferred in certain contexts.

What's the difference between "so why not" and "then why not"?

While both phrases introduce suggestions, "so why not" implies a more immediate or spontaneous connection to the previous point. "Then why not" suggests a more logical or sequential connection, indicating that the suggestion follows as a natural consequence. For example, consider using "so why not" to show that it's a direct reaction, and "then why not" for situations that need a solution to be presented with proper arguments.

When should I avoid using "then why not"?

Avoid using "then why not" in situations where a more direct or assertive statement is required. It's also less suitable when addressing sensitive topics or when a more empathetic approach is necessary. You may also want to avoid this phrase if you don't want to come off too aggressive. Consider using a more neutral suggestion if you want a suggestion that it's perceived as less aggressive.