Given the following sorites:
All H are D.
No D are N.
All N are A.
Some J are A.

Some J are not H.
This sorites is:
A) Invalid because only one term in the conclusion is distributed.
B) Invalid because it has more than two affirmative premises.
C) Invalid because one of the middle terms is undistributed.
D) Invalid because it draws a particular conclusion from three universal premises.
E) Valid because it breaks no rules.

Question

Given the following sorites: 
All H are D.
No D are N.
All N are A.
Some J are A.

Some J are not H.
This sorites is:
A) Invalid because only one term in the conclusion is distributed. 
B) Invalid because it has more than two affirmative premises. 
C) Invalid because one of the middle terms is undistributed. 
D) Invalid because it draws a particular conclusion from three universal premises. 
E) Valid because it breaks no rules.

Quizplus · Accepted Answer

The middle term "N" is undistributed in both premises 2 and 4. Therefore, we cannot make a valid conclusion about the relationship between J and H.

Given the Following Sorites