Logic Test

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Lee
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Logic Test

Post by Lee » 26 Nov 2017, 15:08

http://www.think-logically.co.uk/lt.htm

I found this logic test online. It is only 15 questions long. I think many elmans are highly logical thinkers and I'm interested in seeing some results.
I took the test and got one question "wrong", but I happen to disagree with the answer. I won't reveal which question I got wrong until others have taken the test. Then I can explain my reasoning.
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jonsykkel
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Re: Logic Test

Post by jonsykkel » 26 Nov 2017, 15:35

100%easY

a) Jenny lives in Paris.
b) Paris is in New Zealand.
Conclusion
Therefore Jenny lives in New Zealand.

they shud of picked another city since u cud ez interpret paris in premise b) as a name and not the city
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ile
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Re: Logic Test

Post by ile » 26 Nov 2017, 15:46

it said i got 93% correct

I got the last one about water wrong

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AndrY
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Re: Logic Test

Post by AndrY » 26 Nov 2017, 16:22

wow 100% :o really didn't expect

i puted invalid everywhere, where poss 0.000001% of false :mrgreen:
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Re: Logic Test

Post by skint0r » 26 Nov 2017, 18:57

also 100% and thought max ez, only reason that took more than some sec or two to answer any question was length or roundabout way of writing something
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Lousku
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Re: Logic Test

Post by Lousku » 26 Nov 2017, 20:15

Wow I have 100% smartest possible brain.
then again i don't know anything
maybe easier not to think abouut alöl things thought than not things thought ... or something..=?

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Re: Logic Test

Post by gimp » 26 Nov 2017, 20:50

93% Hello, i said valid for the last question. I am not going to say i got it wrong, cause i dont think i am wrong :/

"a)Water is a molecule composed of two hydrogen atoms and one oxygen atom.
b) Every observation or examination by microscope has confirmed this.

Conclusion
Therefore we can predict that every future examination of water will reveal the same chemical composition."


the premise defined water as H2O so we couldn't even examine 'water' in the future that isn't H2O, it wouldnt be water and needs a different name. I can predict, but don't even really need to, what's the problem here?
Last edited by gimp on 27 Nov 2017, 05:44, edited 1 time in total.
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Lukazz
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Re: Logic Test

Post by Lukazz » 26 Nov 2017, 21:14

I made the same "mistake" as gimp, and I my argumentation is the same. If a) defines what water is, it isn't induction to conclude that every future examination of water will reveal the same chemical composition (unless of course there is the possibility of a future examination being wrong).
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Lee
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Re: Logic Test

Post by Lee » 27 Nov 2017, 03:47

This is the one I got wrong:
a) Jenny lives in Paris.
b) Paris is in New Zealand.
- Therefore Jenny lives in New Zealand.

Valid (but not true because Paris is not in New Zealand!)
I answered invalid because there is no indication that the Paris in a) is the same as the Paris in b), i.e. I'm not assuming that there is only one place in the world named Paris and so cannot jump to the conclusion that Jenny lives in New Zealand.
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Re: Logic Test

Post by gimp » 27 Nov 2017, 05:41

Lee if you make that argument then you also make the argument that if:
a)all ducks quack and
b)Donald is a duck
Conclusion Donald quacks is invalid because we don't know that Donald in the conclusion is the same Donald as in premise a.

Of course it is valid because with premises you kind of have to just forget that the rest of the world exists and keep in mind that the premises are the only reality that the conclusion is using.
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Re: Logic Test

Post by bene » 27 Nov 2017, 13:01

I scored 93% clicked randomly because TLDR orka
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Madness
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Re: Logic Test

Post by Madness » 27 Nov 2017, 13:59

100%
gimp wrote:93% Hello, i said valid for the last question. I am not going to say i got it wrong, cause i dont think i am wrong :/

"a)Water is a molecule composed of two hydrogen atoms and one oxygen atom.
b) Every observation or examination by microscope has confirmed this.

Conclusion
Therefore we can predict that every future examination of water will reveal the same chemical composition."


the premise defined water as H2O so we couldn't even examine 'water' in the future that isn't H2O, it wouldnt be water and needs a different name. I can predict, but don't even really need to, what's the problem here?
Statement B suggests that statement A (water = h2o) is what has been observed and confirmed so far and therefore it is not the ultimate truth. There's no statement that says that if the chemical composition is found to be different by future observations, the examined thing will have to be given a different name rather than having its chemical formula revised.
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AndrY
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Re: Logic Test

Post by AndrY » 27 Nov 2017, 14:14

imo, (water = h20) is true, bcz all statements are true we think.
Statement B means nothing.
And in future someone can make a mistake in examination. So INVALID
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Re: Logic Test

Post by Tigro » 27 Nov 2017, 16:17

I too made mistake only in the water one.
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Re: Logic Test

Post by Bludek » 27 Nov 2017, 16:39

I got Paris wrong (same reasoning as Lee. There could be easily city named Paris in New Zealand, so the correct answer surprised me) and H2O wrong (I kinda knew I was wrong, but still checked "valid").

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