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

I, of course, got 15 out of 15 correct. The last few can get tricky, make sure you read them properly.

I only got 8 (Im surprised i did that well :D)

I didn't do all that well...

I got 11, I don't understand the explanations they give.

Needless complicated are like needles in my complicated mind.

The ones that were valid but not true confused me a bit...

14 out of 15.

Their answer for number 15 is wrong.

The key word is 'predict'.

I got that one wrong too, sedan... But I think you're right. it's unclear wording at best.

14 out of 15.

Their answer for number 15 is wrong.

The key word is 'predict'.
They explain the answer on the next page.

15/15

I have to say a lot of these are false a bit too obviously.

For more challenge you should try the exercises from a Symbolic Logic textbook while at the bookstore. It's boring but the mathematical aspects of it really helps when you look at worded out examples again.

Jeez, apparently these aren't enough of a challenge... Way to make me feel like an idiot...

For more challenge you should try the exercises from a Symbolic Logic textbook while at the bookstore. It's boring but the mathematical aspects of it really helps when you look at worded out examples again.
I'm taking a Symbolic Logic class this semester, as it happens. Seemed like a good humanities choice for a CS major.

I got 15/15, incidentally.

I'm taking a Symbolic Logic class this semester, as it happens. Seemed like a good humanities choice for a CS major.

I got 15/15, incidentally.
It's very good for a CS major. Although I think similar stuff is covered in the Discrete Math class you are probably required to take.

14/15. I got 15 wrong too.

It's very good for a CS major. Although I think similar stuff is covered in the Discrete Math class you are probably required to take.
Yeah, Discrete had a lot of logic as well.

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

I, of course, got 15 out of 15 correct. The last few can get tricky, make sure you read them properly.

Whataya want a .... Holy Picture

I got 14 out of 15, with #15 wrong. I disagree with their answer though.
In their first premise, they define a water molecule by its chemical composition (this makes the second premise irrelevant). So if we were to examine a water molecule it would, according to their definition, be composed of two hydrogen atoms and one oxygen atom. If it was composed of anything else it wouldn't even be a water molecule that we were examining.

I got 14 out of 15, with #15 wrong. I disagree with their answer though.
In their first premise, they define a water molecule by its chemical composition (this makes the second premise irrelevant). So if we were to examine a water molecule it would, according to their definition, be composed of two hydrogen atoms and one oxygen atom. If it was composed of anything else it wouldn't even be a water molecule that we were examining.
But you're assuming that hydrogen and oxygen remain the same to the end of the universe, which is not a safe assumption, isotope concentrations being what they are.

They explain the answer on the next page.Since I already said I disagreed with their answer you should have (logically) been able to deduce that I had read it. :)

But you're assuming that hydrogen and oxygen remain the same to the end of the universe, which is not a safe assumption, isotope concentrations being what they are.

In the real world, yes. But are we supposed to be injecting the real world into the question? Seems to me the question exists in it's own universe, as defined by the question itself.

In the real world, yes. But are we supposed to be injecting the real world into the question? Seems to me the question exists in it's own universe, as defined by the question itself.
Alright, in that case, hydrogen and oxygen were not defined in the premises. As such, there would be no reason to assume that they were immutable.

When I hit submit I receive a message saying I cannot submit the test answers in this way.

Method Not Allowed
The requested method POST is not allowed for the URL /lt_answers.htm.


--------------------------------------------------------------------------------

Apache/1.3.41 Server at www.think-logically.co.uk Port 80

Frogger fails.

http://i123.photobucket.com/albums/o292/millatyme420/fail.jpg

Actually the test fails. A test that will not allow you to submit your answers is a failure as a test.

Sure, fatty. Go play hopscotch by yourself.

Ooooooh! You are the master of the intelligent insult, Nappy. I am in awe of your cutting wit.:lolhit:

http://farm2.static.flickr.com/1212/1272549006_294f713d3c.jpg
Next destination Failtown. Passengers: 1.

Frogger fails.
I'm getting a 405 as well. Seems that page died somehow.

Sure. But Frogger's stupid. He fails anyway. Fear my logic!

I'm lucky I don't have any respect for Nappy or his opinions. I see him as a quitter and a loser who will never amount to anything so I really don't care what he says about me.


Come back when you have stuck to something, ie. military, college, a job, and then maybe I will give a shit about what you say. Until that time you are just another loser.

What a jip, I get that error message too.

I'm lucky I don't have any respect for Nappy or his opinions. I see him as a quitter and a loser who will never amount to anything so I really don't care what he says about me.


Come back when you have stuck to something, ie. military, college, a job, and then maybe I will give a shit about what you say. Until that time you are just another loser.
You shouldn't talk back to your betters, Frogger.

Don't worry, I won't if I ever come across one.


Oh, you think you are better than me. Please don't make me laugh when I am drinking Coke. It is really uncomfortable.:lolhit:

Seems to me the question exists in it's own universe, as defined by the question itself.
In a way that's true.

Most people with a pretty good grasp of reasoning will likely get that 14/15. Then you run into stuff that don't make a lot of common sense. It's still logic, but it's not how most people treat statements. You get these questions right if you were taught the principles, otherwise you don't. It's not really about intelligence.

Incidentally people who get less than that 14/15 correct usually mess up because they try to decide if every statement makes sense. Not realizing that it doesn't matter what each the statement says, we are just trying to conclude if the statements lead to a certain conclusion. For example some people see a statement that says "1 + 1 = 3 on the planet of earth" and think hell there's no way anything about this question can be "Valid".

In a way that's true.

Most people with a pretty good grasp of reasoning will likely get that 14/15. Then you run into stuff that don't make a lot of common sense. It's still logic, but it's not how most people treat statements. You get these questions right if you were taught the principles, otherwise you don't. It's not really about intelligence.

Incidentally people who get less than that 14/15 correct usually mess up because they try to decide if every statement makes sense. Not realizing that it doesn't matter what each the statement says, we are just trying to conclude if the statements lead to a certain conclusion. For example some people see a statement that says "1 + 1 = 3 on the planet of earth" and think hell there's no way anything about this question can be "Valid".


Exactly.

I wish I could have got a score though. Pretty sure I got them all right.

The question exist by themselves without reference to prior or other knowledge. If the choice is valid based on the original statements it is valid no matter how silly it might seem.

In the example:

All hotels are green.

The Radison is a hotel

The Radison is green.

The statement is valid even though we know from prior knowledge that not all hotels are green.

I keep getting.

"The requested method POST is not allowed for the URL /lt_answers.htm."

Whats up?

The statement is valid even though we know from prior knowledge that not all hotels are green.

Unless it's question 15, at which point we have to allow for the possibility that on a planet with a different color sun, we might perceive the green hotel as being blue. :D

Alright, in that case, hydrogen and oxygen were not defined in the premises. As such, there would be no reason to assume that they were immutable.

But then are we supposed to start questioning everything? In question 5, are both statements referring to the same Camberwell?

Having said that, I wasn't comfortable with my answer to #15 to begin with - I figured there must be more to it than I was seeing. But their explanation wasn't the missing piece I was looking for.