# Lateral Thinking Puzzles - third time is best!

**URL:** <https://boards.straightdope.com/t/lateral-thinking-puzzles-third-time-is-best/987214>\
**Category:** Thread Games\
**Created:** [July 18, 2023, 1:39pm UTC](https://boards.straightdope.com/t/lateral-thinking-puzzles-third-time-is-best/987214 "2023-07-18T13:39:29Z")\
**Posts on this page:** 20\
**Page:** 228

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**Author:** ![Fretful\_Porpentine](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/fretful_porpentine/32/2873_2.png) [@Fretful\_Porpentine](https://boards.straightdope.com/u/Fretful_Porpentine)\
**Post date:** [May 6, 2026, 10:45pm UTC](https://boards.straightdope.com/t/lateral-thinking-puzzles-third-time-is-best/987214/4541 "2026-05-06T22:45:36Z")

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Does the profession involve espionage? Undercover work of any sort?

Are the people trying to fail the test in the same profession as the one that it was suggested you should go into?

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**Author:** ![Sigene](https://avatars.discourse-cdn.com/v4/letter/s/df788c/32.png) [@Sigene](https://boards.straightdope.com/u/Sigene)\
**Post date:** [May 6, 2026, 11:22pm UTC](https://boards.straightdope.com/t/lateral-thinking-puzzles-third-time-is-best/987214/4542 "2026-05-06T23:22:48Z")

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> [@The\_Other\_Waldo\_Pepper](#):
>
> In this scenario, it’s not employers or prospective employers, or medical personnel or educators; I guess ‘government officials’ is the least bad way to put it.

Prosecutors?

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**Author:** ![The\_Other\_Waldo\_Pepper](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/the_other_waldo_pepper/32/12370_2.png) [@The\_Other\_Waldo\_Pepper](https://boards.straightdope.com/u/The_Other_Waldo_Pepper)\
**Post date:** [May 7, 2026, 12:06am UTC](https://boards.straightdope.com/t/lateral-thinking-puzzles-third-time-is-best/987214/4543 "2026-05-07T00:06:07Z")

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> [@Fretful\_Porpentine](#):
>
> Does the profession involve espionage? Undercover work of any sort?

Yes.

> [@](#):
>
> Are the people trying to fail the test in the same profession as the one that it was suggested you should go into?

Yes.

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**Author:** ![The\_Other\_Waldo\_Pepper](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/the_other_waldo_pepper/32/12370_2.png) [@The\_Other\_Waldo\_Pepper](https://boards.straightdope.com/u/The_Other_Waldo_Pepper)\
**Post date:** [May 7, 2026, 12:06am UTC](https://boards.straightdope.com/t/lateral-thinking-puzzles-third-time-is-best/987214/4544 "2026-05-07T00:06:45Z")

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> [@Sigene](#):
>
> Prosecutors?

I don’t believe so, no.

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**Author:** ![Fretful\_Porpentine](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/fretful_porpentine/32/2873_2.png) [@Fretful\_Porpentine](https://boards.straightdope.com/u/Fretful_Porpentine)\
**Post date:** [May 8, 2026, 3:46am UTC](https://boards.straightdope.com/t/lateral-thinking-puzzles-third-time-is-best/987214/4545 "2026-05-08T03:46:04Z")

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Is the profession international espionage? Domestic, like being an FBI informant or similar? Are people in this profession generally regarded as criminals?

Is the test specifically intended to ferret out spies / informants / other untrustworthy types?

Would it be useful to know more about why it is ordinarily hard to fail on purpose? Are involuntary responses involved, like a lie detector test?

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**Author:** ![Sigene](https://avatars.discourse-cdn.com/v4/letter/s/df788c/32.png) [@Sigene](https://boards.straightdope.com/u/Sigene)\
**Post date:** [May 8, 2026, 1:18pm UTC](https://boards.straightdope.com/t/lateral-thinking-puzzles-third-time-is-best/987214/4546 "2026-05-08T13:18:52Z")

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Does this involve counterfeiting in anyway?

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**Author:** ![The\_Other\_Waldo\_Pepper](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/the_other_waldo_pepper/32/12370_2.png) [@The\_Other\_Waldo\_Pepper](https://boards.straightdope.com/u/The_Other_Waldo_Pepper)\
**Post date:** [May 8, 2026, 4:48pm UTC](https://boards.straightdope.com/t/lateral-thinking-puzzles-third-time-is-best/987214/4547 "2026-05-08T16:48:26Z")

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> [@Fretful\_Porpentine](#):
>
> Is the profession international espionage? Domestic, like being an FBI informant or similar? Are people in this profession generally regarded as criminals?

International espionage, which I guess tells you how they’re generally regarded, insofar as they’re presumably breaking the law _where they’re at_ on instructions from officials _back home._

> [@](#):
>
> Is the test specifically intended to ferret out spies / informants / other untrustworthy types?

It’s administered, in this context, to ferret out spies.

> [@](#):
>
> Would it be useful to know more about why it is ordinarily hard to fail on purpose?

I think you’d have the whole thing if you had that.

> [@](#):
>
> Are involuntary responses involved, like a lie detector test?

I’d say that, yeah, involuntary response are involved.

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**Author:** ![The\_Other\_Waldo\_Pepper](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/the_other_waldo_pepper/32/12370_2.png) [@The\_Other\_Waldo\_Pepper](https://boards.straightdope.com/u/The_Other_Waldo_Pepper)\
**Post date:** [May 8, 2026, 4:52pm UTC](https://boards.straightdope.com/t/lateral-thinking-puzzles-third-time-is-best/987214/4548 "2026-05-08T16:52:57Z")

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> [@Sigene](#):
>
> Does this involve counterfeiting in anyway?

I don’t believe so. (I mean, you guys now have the “international espionage” aspect, and I guess I’d figure that a spy would walk around with a fake ID in his pocket, and you could maybe argue that a test that catches spies would indirectly reveal the truth about said ID, but that’s presumably not what you have in mind.)

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**Author:** ![Sigene](https://avatars.discourse-cdn.com/v4/letter/s/df788c/32.png) [@Sigene](https://boards.straightdope.com/u/Sigene)\
**Post date:** [May 8, 2026, 6:15pm UTC](https://boards.straightdope.com/t/lateral-thinking-puzzles-third-time-is-best/987214/4549 "2026-05-08T18:15:14Z")

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> [@The\_Other\_Waldo\_Pepper](#):
>
> but that’s presumably not what you have in mind.

You are correct, that is not what I had in mind. I was thinking being able to tell fake currencies as part of the test, and the colors throwing some people off.

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**Author:** ![Fretful\_Porpentine](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/fretful_porpentine/32/2873_2.png) [@Fretful\_Porpentine](https://boards.straightdope.com/u/Fretful_Porpentine)\
**Post date:** [May 8, 2026, 6:52pm UTC](https://boards.straightdope.com/t/lateral-thinking-puzzles-third-time-is-best/987214/4550 "2026-05-08T18:52:12Z")

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Is it an “implicit association” type of test? Specifically, are people presented with a variety of words in different colors and told to click on (say) all the green ones, but some of those green-colored words actually _mean_ things like “blue” and “yellow” in Language X? So a spy who is actually a native speaker of Language X, but is pretending not to be, is more likely to get their wires crossed?

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**Author:** ![The\_Other\_Waldo\_Pepper](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/the_other_waldo_pepper/32/12370_2.png) [@The\_Other\_Waldo\_Pepper](https://boards.straightdope.com/u/The_Other_Waldo_Pepper)\
**Post date:** [May 8, 2026, 7:13pm UTC](https://boards.straightdope.com/t/lateral-thinking-puzzles-third-time-is-best/987214/4551 "2026-05-08T19:13:57Z")

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I figure that’s close enough!

The professor was telling the class about the Stroop Effect, explaining that it got used to catch Russian spies who of course claimed to not even speak Russian, and who got shown a bunch of words in various colors: if you don’t speak the language, you can rattle off the colors of those letter groupings — you say “red, blue, orange, brown, yellow, green” with no hesitation, and you don’t even know if you’ve been looking at the Russian words for “elephant” and “death” and “firewood” or whatever — but if you’re looking at red letters that spell out “green” and blue letters that spell out “brown”, you slow down and effectively pass the Do You Understand Russian test.

I of course suggested that they claim to be colorblind, the professor of course replied that it wouldn’t work because there are ways to check if someone is faking colorblindness, I of course replied that I really _am_ colorblind, and he of course brought the house down by waving a hand in my direction and saying “then _you_ go play secret agent.”

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**Author:** ![Chronos](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/chronos/32/134_2.png) [@Chronos](https://boards.straightdope.com/u/Chronos)\
**Post date:** [May 9, 2026, 11:02pm UTC](https://boards.straightdope.com/t/lateral-thinking-puzzles-third-time-is-best/987214/4552 "2026-05-09T23:02:19Z")

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Ah, as I was reading through to catch up, I thought of the Stroop effect. Using it to catch spies would never even have occurred to me.

I wonder if that’s more reliable than testing for knowing the second and third verse of the “Star-Spangled Banner”?

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**Author:** ![BigT](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/bigt/32/12044_2.png) [@BigT](https://boards.straightdope.com/u/BigT)\
**Post date:** [May 19, 2026, 9:12pm UTC](https://boards.straightdope.com/t/lateral-thinking-puzzles-third-time-is-best/987214/4553 "2026-05-19T21:12:21Z")

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The Stroop Effect was also used to show hypnosis was real, as you can hypnotize someone to forget how to read and they will respond the same as someone not knowing the language. It’s the one test that sticks out in my brain that I bring up when I see rationalist anti-woo people who think hypnosis is fake.

(I also have a decent amount of experience with it.)

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**Author:** ![Mahaloth](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/mahaloth/32/1079_2.png) [@Mahaloth](https://boards.straightdope.com/u/Mahaloth)\
**Post date:** [May 20, 2026, 11:36pm UTC](https://boards.straightdope.com/t/lateral-thinking-puzzles-third-time-is-best/987214/4554 "2026-05-20T23:36:34Z")

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**Anna and Kirstie never met, but both share a very unusual thing about themselves. While not wholly unique to just them, it’s certainly quite rare. Any thoughts on what it might be?**

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**Author:** ![Fretful\_Porpentine](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/fretful_porpentine/32/2873_2.png) [@Fretful\_Porpentine](https://boards.straightdope.com/u/Fretful_Porpentine)\
**Post date:** [May 20, 2026, 11:43pm UTC](https://boards.straightdope.com/t/lateral-thinking-puzzles-third-time-is-best/987214/4555 "2026-05-20T23:43:23Z")

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By “share a very unusual thing about themselves,” do you simply mean they have an unusual trait in common?

That they share some physical thing with each other?

That they share information about themselves? With each other? With other people?

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**Author:** ![Peter\_Morris](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/peter_morris/32/359_2.png) [@Peter\_Morris](https://boards.straightdope.com/u/Peter_Morris)\
**Post date:** [May 20, 2026, 11:44pm UTC](https://boards.straightdope.com/t/lateral-thinking-puzzles-third-time-is-best/987214/4556 "2026-05-20T23:44:22Z")

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I heard about a case where someone was arrested because their fingerprint matched one at a crime scene. Trouble was they were on another continent at the time of the crime.

Turned out that fingerprints aren’t completely unique after all. A different person had a matching print, and was the real perpetrator.

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<div class="post-metadata">

**Author:** ![Mahaloth](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/mahaloth/32/1079_2.png) [@Mahaloth](https://boards.straightdope.com/u/Mahaloth)\
**Post date:** [May 20, 2026, 11:50pm UTC](https://boards.straightdope.com/t/lateral-thinking-puzzles-third-time-is-best/987214/4557 "2026-05-20T23:50:54Z")

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> [@Fretful\_Porpentine](#):
>
> 1. By “share a very unusual thing about themselves,” do you simply mean they have an unusual trait in common?
> 
> 2. That they share some physical thing with each other?
> 
> 3. That they share information about themselves? With each other? With other people?

1. " A **trait** is a distinguishing characteristic, quality, or feature that defines an individual person, object, or organism.

- by that definition, no not a trait

1. No

2. No

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<div class="post-metadata">

**Author:** ![Mahaloth](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/mahaloth/32/1079_2.png) [@Mahaloth](https://boards.straightdope.com/u/Mahaloth)\
**Post date:** [May 20, 2026, 11:51pm UTC](https://boards.straightdope.com/t/lateral-thinking-puzzles-third-time-is-best/987214/4558 "2026-05-20T23:51:21Z")

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> [@Peter\_Morris](#):
>
> I heard about a case where someone was arrested because their fingerprint matched one at a crime scene. Trouble was they were on another continent at the time of the crime.
> 
> Turned out that fingerprints aren’t completely unique after all. A different person had a matching print, and was the real perpetrator.

Neat.

But no in this case.

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<div class="post-metadata">

**Author:** ![Mahaloth](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/mahaloth/32/1079_2.png) [@Mahaloth](https://boards.straightdope.com/u/Mahaloth)\
**Post date:** [May 21, 2026, 2:24am UTC](https://boards.straightdope.com/t/lateral-thinking-puzzles-third-time-is-best/987214/4559 "2026-05-21T02:24:01Z")

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Note: After this puzzle, I think I’ll finally create a new thread, our fourth one.

OK, back to the puzzle.

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<div class="post-metadata">

**Author:** ![Fretful\_Porpentine](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/fretful_porpentine/32/2873_2.png) [@Fretful\_Porpentine](https://boards.straightdope.com/u/Fretful_Porpentine)\
**Post date:** [May 21, 2026, 2:32am UTC](https://boards.straightdope.com/t/lateral-thinking-puzzles-third-time-is-best/987214/4560 "2026-05-21T02:32:04Z")

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Are Anna and Kirstie both human?

Are they real people? Fictional characters? If fictional, did you make them up for this puzzle, or are they from a pre-existing source such as a book or movie?

If real, were they alive at the same time? Is either / both currently alive?

Would it be helpful to narrow down the time period?

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