Logical Reasoning - Logical Problems - Discussion

Each problem consists of three statements. Based on the first two statements, the third statement may be true, false, or uncertain.

1. 

All Lamels are Signots with buttons.
No yellow Signots have buttons.
No Lamels are yellow.
If the first two statements are true, the third statement is

[A]. true
[B]. false
[C]. uncertain

Answer: Option A

Explanation:

We know that there are Signots with buttons, or Lamels, and that there are yellow Signots, which have no buttons. Therefore, Lamels do not have buttons and cannot be yellow.

Abhinav Sanghvi said: (Sep 1, 2012)  
I am not properly getting it. Please elaborate it.

Sujit said: (Nov 6, 2012)  
What I got is This
Lamels are Signots
Signots have button
There are Yellow Signots that do not have button
But there is no mention that Yellow Signots are not lamel

The Explanation does not seems relevant
"We know that there are Signots with buttons, or Lamels, and that there are yellow Signots"
It Should have been "We know that there are Lamels with signots, or buttons, and that there are yellow Signots, which have no buttons. Therefore, Lamels do not have buttons and cannot be yellow."

Anubahv said: (Nov 23, 2013)  
The answer its [A]. True.

Because All Lamels are Signots with buttons and so no lamels will be without buttons whether it will be of any colour (yellow or something else). So No Lamels are yellow.

Mari said: (Jan 23, 2014)  
We know that there are Signots with buttons, or Lamels, and that there are yellow Signots".

It Should have been "We know that there are Lamels with signots, or buttons, and that there are yellow Signots, which have no buttons. Therefore, Lamels do not have buttons and cannot be yellow.

Kavitha said: (Jul 4, 2015)  
It is that lamels are signots with buttons. It means lamels for sure have buttons. But it is given that yellow signots don't have buttons. So it is compulsory that lamels should have buttons but yellow signots don't have buttons. So yellow signots can't be lamels.

Mussa said: (May 8, 2018)  
I am not understanding the solution. Please explain it.

Sonali Jain said: (May 28, 2018)  
Please elobrate it by using Venn diagram.

Shaikh Arbazuddin said: (Sep 2, 2019)  
L - s - b.
Y * s * b.

Find out where l and y is in relation? There's no.

So in conclusion, they said no lamels are yellow. That's true. I hope you got it.

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