Used and loved by millions
Since I tried Ludwig back in 2017, I have been constantly using it in both editing and translation. Ever since, I suggest it to my translators at ProSciEditing.

Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com
think which one
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "think which one" is not correct in standard written English.
It may be intended to prompt someone to consider options, but it lacks clarity and proper structure. Example: "When deciding on a restaurant, think which one you would prefer based on the menu."
⚠ May contain grammatical issues
News & Media
Wiki
Academia
Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Human-verified examples from authoritative sources
Exact Expressions
9 human-written examples
I used to go back and forth and think which one I liked better.
News & Media
"There were so many Lewandowski goals that I cannot think which one he means," he smiled, blowing out his cheeks.
News & Media
With that long neck and little head and those big, shiny eyes, he bore a strong resemblance to one of the more exotic rodents, though for the moment Glass could not think which one.
News & Media
I never really come to WordPress and think, "what should I write about today?" Either it's a thought I've had and have to get out of my head, or something I'm reacting to because I read a post that I want to respond to or – as is usually the case – I look through my titles and think, "which one am I passionate about today?" And here's where the formal structure comes in.
News & Media
Two things changed, and it is interesting to think which one caused the other.
News & Media
When trying to figure out which after school club you should pick, try to think which one you can stick your commitment with.
Wiki
Human-verified similar examples from authoritative sources
Similar Expressions
51 human-written examples
Take a while to think which ones "NEED" to be done and which ones you "WANT" to do.
Wiki
Despite her efforts, I just thought, "Which one was Pingré, again?
News & Media
(To see how this could lead to bad decisions, imagine your boss staring at two research studies headlined "Data That Supports What You Think" and "Data That Contradicts What You Think". Guess which one gets cited at the staff meeting).
News & Media
I think we can guess which one Berry was.
News & Media
Bradford: I think I can guess which one you picked.
News & Media
Expert writing Tips
Best practice
When presenting options, follow "consider which one" with a clear list or description of the available choices to aid understanding.
Common error
Avoid using the phrase "think which one" in formal contexts such as academic papers or business reports. Instead, opt for more precise and grammatically sound alternatives like "consider which option" or "determine which one" to maintain a professional tone.
Source & Trust
79%
Authority and reliability
3.1/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "think which one" functions primarily as an interrogative prompt, encouraging consideration among multiple options. It combines a verb of cognition ('think') with an interrogative pronoun ('which') to initiate a selection process. As Ludwig AI points out, this is not a standard English construction, and better alternatives exist.
Frequent in
News & Media
33%
Wiki
33%
Academia
17%
Less common in
Formal & Business
8%
Science
8%
Reference
0%
Ludwig's WRAP-UP
In summary, while the phrase "think which one" appears in various sources like news articles, wikis and academic texts, it's considered grammatically incorrect. Ludwig AI confirms this assessment, suggesting that more standard alternatives such as "consider which one" or "decide which one" are preferable, especially in formal contexts. Although fairly common, remember there are plenty of choices that could enrich the semantic content.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
choose which one
Focuses on the selection process, highlighting the act of choosing.
select which one
Similar to 'choose', but slightly more formal.
consider which option
More formal and direct replacement, focusing on the act of considering.
decide which one
Emphasizes the act of making a choice rather than just thinking.
determine which one
Suggests a more analytical and conclusive decision-making process.
identify which one
Highlights the act of recognizing or pointing out a specific item.
figure out which one
More informal, implying a process of discovery or problem-solving.
ascertain which one
Very formal, implying a careful and thorough investigation to find the correct option.
reflect on which one
Focuses on thoughtful consideration and contemplation before making a decision.
ponder which one
Implies a deeper and more thoughtful consideration.
FAQs
Is "think which one" grammatically correct?
While used in some contexts, "think which one" is not considered standard English. It's better to use phrases like "consider which one" or "decide which one".
What are some alternatives to "think which one"?
Alternatives include "consider which option", "decide which one", "determine which one", or "figure out which one", depending on the desired level of formality.
How can I use "consider which one" in a sentence?
You can use "consider which one" when you want someone to carefully evaluate options. Example: "When choosing a career path, consider which one aligns best with your skills and interests."
What's the difference between "think which one" and "decide which one"?
"Think which one" implies a process of consideration, whereas "decide which one" suggests a final choice or resolution has been made. The latter is more decisive.
Editing plus AI, all in one place.
Stop switching between tools. Your AI writing partner for everything—polishing proposals, crafting emails, finding the right tone.
Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Source & Trust
79%
Authority and reliability
3.1/5
Expert rating
Real-world application tested