UCAT: Decision Making

[whys]

View attachment 3573
Is it just me or is this explanation weird. I put down 'no' for the second part and it marked me wrong, whereas in the solution it says 'does not follow'??

That's probably an error on their part. noodleboy123 it marked cocodreams wrong for the second statement when it should have marked that as correct. I think morning time is getting to you!

 

[nb]

That's probably an error on their part. noodleboy123 it marked cocodreams wrong for the second statement when it should have marked that as correct. I think morning time is getting to you!

Yikes. I thought no one would've saw my post. How are you so quick !!?

 

[N182]

This is incorrect. I have emailed the official UCAT consortium and they have given me a response.
Essentially, my first question asked them if all donkeys are black, can we say some donkeys are black?
They said NO, because some does not include 100%.

Second question was regarding not all. Not all actually implies some and CANNOT include zero. Not all is the same thing as some.
I really hope this helps clear all your doubts. Enjoy
View attachment 3572

Ok I will go with some does not include 100%, but then should we ignore the previous example which included 100% from official?

 

[nb]

Ok I will go with some does not include 100%, but then should we ignore the previous example which included 100% from official?

That had different wording! Some of the sleeping children are boys is a valid statement to make. (As there are girls who are also sleeping). However, if it said some of the boys are sleeping, that would be incorrect, as ALL of the boys are sleeping.

 

[N182]

That had different wording! Some of the sleeping children are boys is a valid statement to make. (As there are girls who are also sleeping). However, if it said some of the boys are sleeping, that would be incorrect, as ALL of the boys are sleeping.

But couldn't it also be possible that zero girls are asleep, and so all the sleeping children are boys?

 

[whys]

But couldn't it also be possible that zero girls are asleep, and so all the sleeping children are boys?

My reasoning exactly. I'm going to take what noodleboy sent us from the UCAT makers as fact though, for all we know the online question I sent could have been outdated (it certainly looked outdated).

 

[A1]

This is incorrect. I have emailed the official UCAT consortium and they have given me a response.
Essentially, my first question asked them if all donkeys are black, can we say some donkeys are black?

Wrt "all donkeys are black, can we say some donkeys are black" this Wiki page shows 1 of 24 valid syllogisms

> File:Modus Barbari.svg - Wikipedia
All S are M, all M are P (combined to all S are P), thus some S are P.

UCAT saying No to some donkeys are black means UCAT wants you to digest the words in conversation English. Please stop referring to syllogism

 

[N182]

So basically we should use rainfall's meaning of terms
ALL = 100%
MOST = 50%<x<100%
SEVERAL = 2 or more (includes 100%)
AT LEAST SOME = 0%<x (also includes 100%)
SOME =NOT ALL= 0%<x<100%
NONE = 0%

Also does few mean 0%<x<50%?
We also concluded that either..or=or= one set or the other or both set right?

 

[whys]

I don't understand the answer explanation for statement 3. I don't get how the answer is 'yes'.

 

[N182]

View attachment 3575
I don't understand the answer explanation for statement 3. I don't get how the answer is 'yes'.

Content removed

 

[nb]

so some means more then 1, but not all right?

Lol, I just did a similar question and it was marked as wrong. It uses the fact that some is a subset of all, and thus can be concluded as Yes, which we now know from the official consortium that this isn't the case. I want to reiterate this:
If all donkeys are black. A question says some donkeys are black, THIS IS FALSE. Do not fall into this trap!

 

[dani01]

Hi would someone be able to help me with this question? tia

 

[N182]

Hi would someone be able to help me with this question? tia
View attachment 3577

It could be the case that all insects with wings are butterflies, we are given no information about insects with wings, but only given info about insects in general.

 

[whys]

Hi would someone be able to help me with this question? tia
View attachment 3577

There is no information in the passage that confirms that there are other winged insects apart from butterflies. For all we know, butterflies could be the only winged insects and no other winged insects may be in existence.

 

[whys]

I'm confused now too. I've always practised with some could equal all

I don't have any examples on me, but if you go to the previous page, noodleboy has linked us the UCAT's official stance regarding this.

 

[mideasyrole]

Hi,
Can someone please help me with this question. I'm having trouble with comparing the probabilities between the two choices.

 

[A1]

Hi,
Can someone please help me with this question. I'm having trouble with comparing the probabilities between the two choices.

It looks to me like:
- Stock : 0.7 chance of up to 12% return, 0.2 chance between 12% & 50% return, 0.1 chance 50%+ return.
- Gold : 0.7 chance of up to 12% return, 0.1 chance between 12% & 50% return, 0.2 chance 50%+ return.

That being the case B would be the correct answer.

 

[iwannastudydent]

Could someone please help me with the following syllogism. How would you draw this as a Venn Diagram, or any diagram for that matter

 

[dani01]

Could someone please help me with the following syllogism. How would you draw this as a Venn Diagram, or any diagram for that matter

View attachment 3590

I wouldn't really draw a venn diagram for this as its more of a "copy and paste" kind of statement. So for number 3 we know that houses are only in large countries. And since those who are from small countries own houses in more than one continent we immediately make the connection that they must be in at least 2 large countries. For number 4- the statement does not tell us whether or not people from large countries own houses or not so we can't assume that all the people who own houses are from small countries, since some may be from large countries. We don't know, so the answer is no.
Hope that helps!

 

[DCA]

Does most include all?

e.g if all apples are red, does it mean that most apples are red, or does this conclusion not follow?