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 chairs are tables.
All chairs are stairs.
All tables are roofs.
Conclusions:
I. Some roofs are stairs.
II. Some roofs are chairs.
III. All tables are stairs.
Show answer & explanation
Correct answer: D
Explanation
The correct answer is option 4, i.e., Only conclusions I and II follow.
Conclusions:
I. Some roofs are stairs → Follows (Some chairs are tables that are all Roof also all chairs are stairs. Here some parts of the roof are in the table and also in the chair. So definitely some roofs are stairs. )
II. Some roofs are chairs → Follows (some chairs are roofs, which means some roofs are chairs)
III. All tables are stairs → Does not follow (We cannot conclude that all tables are stairs, because only some tables are chairs, and only chairs are confirmed as stairs. So we cannot generalize for all tables.)