sentence 1: How do I know if I'm good?
 sentence 2: How do I know what I'm good at? sentence 1: Who is in the best interest for india? Hillary or Trump?
 sentence 2: Who is good for India Hillary or Trump? sentence 1: Why do climate change deniers deny climate change?
 sentence 2: Why are so many people denying climate change?
not same meaning
same meaning
same meaning