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More ways to get Braingle...

Not True

Science brain teasers require understanding of the physical or biological world and the laws that govern it.

 

Puzzle ID:#27888
Fun:*** (2.2)
Difficulty:** (1.88)
Category:Science
Submitted By:metallicman*us***
Corrected By:SPUTNIK2

 

 

 



Two geologists, Dr. Roeboensonsin and Dr. Thistle, were preparing a test sample for a student. The student, who was spending one college trimester doing field work, has been doing very questionable work. Both doctors wonder if he is a student or not.

The student came the next day to work through the sample. He got through every sample, finally coming to the last one. He looked down at it, and said, "These are two diamonds". Dr. Thistle and Dr. Roeboensonsin both knew that a student couldn't get that sample wrong and told him to go home, as he wasn't a student. Why was his answer wrong?




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Comments

doghouse270**
Jan 04, 2006

thats sorta confusing, i mean i wouldn;t know that either. pretty good teaser, though
aussiebrown666
Jan 04, 2006

I figured you meant something like that, but it's not really a well structured teaser. We aren't given enough information. The answer could also have been one was a diamond, and the other was a severed ear! No student would get that wrong either!
froggyggAus*
Jan 05, 2006

Great teaser tinman. Gee, got any of those diamonds laying around you don't need?
metallicman*us*
Jan 05, 2006

Aussiebrown and doghouse, I'm sorry you didn't get it.

Froggy, I wouldn't give up a diamond that easily!
tarheel*us*
Jan 06, 2006

This teaser was a little vague...
Brainy_1Aus*
Jan 08, 2006

I didn't quite understand the teaser? I'm confused.
Warrior_Poet
Jan 12, 2006

My first thought was that he was examining the samples through a stereoscope and only looked through one eyepiece at a time. In that case there would only be one diamond but he would have seen two images of it
Winner4600*
Feb 24, 2006

I got close...thought they were BOTH cubic zirconias! Great teaser metallicman!
cat27514
Feb 26, 2006

I think that the teaser means that any student should've known that they were both diamonds (to test if two minerals are both diamonds, you have to know if one of them is a diamond first. Then, you try to scratch the other mineral with the diamond, if it scratches the other mineral, then the other mineral isn't a diamond.) Hope I helped!
Winner4600*
Feb 27, 2006

well, in this case, they weren't both diamonds, and anyway, it IS possible to have one diamond harder than another
VudluxiA*
May 31, 2006

I wish our teachers had sent us home for appearing not to be students. Sounds better than detention or lines.
dantak*de
Jun 17, 2006

Couldn't the answer have been anything? Maybe it would be that they were both sapphires. I mean, aren't there an infinite number of ways to prove that someone is stupid? Sorry but didn't enjoy the logic.
seanlandrewsAus*
Oct 17, 2006

I'm sorry but I didn't like this teaser. Rather vague and hard to understand the question.
stil*us*
Jan 02, 2007

Or-
Both were diamonds and the student proved he was an accomplished gemologist because he relied only on his eyes.
These goofy professors really underestimate the ability of students to screw up. (Who hasn't watched someone test the same sample twice and get different results? Maybe the zircon was never tested.)
RedPythonAgb
Jul 16, 2007

I try never to be negative when posting comments, so I give some constructive comments rather than criticism. I think that people like the science teasers because it lets them test their knowledge, and if they find a teaser they don't know the answer to, it is interesting to learn something new and find out why the answer is what it is. When I read the teaser I thought, "This is a good one, I don't know the answer, and I'm going to learn something new!" When I started reading the answer I thought "Wow! I might learn an easy way of telling diamond and cubic zirconia apart. Unfortunately although a student geologist may be easily able to tell these two minerals apart I am not a geologist and so can't. As such I learnt nothing new, this is why I think many comments criticise this teaser. Maybe it would have been better to state in the question that the student couldn't tell them apart so the geologists knew he wasn't actually a student and then ask was why he should have known. The answer should contain the differences between the two substances and how to tell the difference, and then many of us would have learnt something new. If metallicman reads this comment, might I suggest he post a comment telling us how to tell the difference.
I notice that you have written 62 teasers as of now, so don't let these comments dishearten you. Read them, learn from them, and improve future teasers because of them.
jsdodgersAus*
Sep 28, 2007

the teaser is not descriptive enough!!!
rockstar1234567Aca*
Mar 03, 2008

more description
uhhhhAus*
Apr 22, 2008

Not explanatory enough.
eamonca*
Feb 17, 2009

Very poorly written teaser.
TableElbowsA*
Aug 21, 2009

So how DO you know the difference?



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