Question

Choose that set in which the statements are logically relate(d)
1. Some bubbies are not dubbles
2. Some dubbles are not bubbles
3. No one who is rubbles is dubbles
4. All dubbles are rubbles
5. Some dubbles are bubbles
6. Some who are rubbles are not bubbles

• A. 136
• B. 456
• C. 123
• D. 246

Hint:

In syllogism problems, begin with universal negatives as they limit set intersections, then fit in particular statements to avoid contradictions.

Answer 1

The Correct Option is A

Step 1: (1) “Some bubbies are not dubbles” means part of the bubbies set lies outside the dubbles set.
Step 2: (3) “No one who is rubbles is dubbles” means rubbles and dubbles are disjoint. This is a strong universal negative that fixes two sets completely apart.
Step 3: (6) “Some who are rubbles are not bubbles” means rubbles are not fully inside bubbles.
These three can all be placed in a Venn diagram without contradiction. Pairs like (3) and (4) conflict directly (“No rubbles are dubbles” vs. “All dubbles are rubbles”).