Three statements are given followed by three conclusions numbered I, II, and III. Assuming the statements to be true, even if they seem to be at variance with commonly known facts, decide which of the conclusions logically follow(s) from the statements.
Statements:
Some sounds are noises.
All noises are debates.
Some debates are conversations.
Conclusions:
I. No noise is a conversation.
II. At least some conversations are sounds.
III. Some sounds are debates.
Show answer & explanation
Correct answer: D
Explanation
The correct answer is option 4 i.e. Only conclusion III follows.
The least possible Venn Diagram for the given statements is drawn below:
Conclusions:
I. No noise is a conversation → False (It is possible, but no definite conclusion can be drawn.)
II. At least some conversations are sounds → False (It is possible, but no definite conclusion can be drawn.)
III. Some sounds are debates → True (As some sounds are noises, and all noises are debates, so, some sounds are debates is also true.)
Hence, Only conclusion III follows.