Question 1
Given:
A is B's father.
B is C's mother.
C is D's sister.
Find the minimum steps to deduce A's relation to D.
Step 1: A is B's father.
Step 2: B is C's mother.
Step 3: C is D's sister → B is also D's mother.
Therefore, A is D's grandfather after 3 logic steps.
Step 2: B is C's mother.
Step 3: C is D's sister → B is also D's mother.
Therefore, A is D's grandfather after 3 logic steps.