sentence 1: How do I know if I'm good?
 sentence 2: How do I know what I'm good at? sentence 1: Is aluminum cookware bad?
 sentence 2: Is cast aluminum cookware safe? Why? sentence 1: Who does the evil robot Ultron have a crush on?
 sentence 2: What does the evil robot Ultron have a crush on?
not same meaning
same meaning
same meaning