Anyone who does both Acting and Basketball is incredible. There is at least one person who does Basketball who is not incredible. Hence, there must be at least one individual who does not do Acting.

Use A(x) and B(x) respectively for x doing Acting and Basketball, I(x) for x being incredible. Construct a proof for the final sentences.

Follow these steps:

1. Natural language to FOL.

2. FOL to CNF.

3. Resolution Principle (Negate conclusion).

4. Resolution Tree.

Thanks!