Question 1
Is C the niece of A?
Statements:
1. A is B's sibling. B is C's parent.
2. C is female.
Statement 1: Tells A is B's sibling and B is C's parent. A could be uncle/aunt, but we don't know C's gender. Statement 2: Tells C is female. Only together do we know A is C's aunt/uncle and that C is a niece.