sentence 1: How do I know if I'm good?
 sentence 2: How do I know what I'm good at? sentence 1: Can anyone share some of their greatest mischief events in life?
 sentence 2: Has anyone or any event changed your life recently, what is it? sentence 1: How does Quora get so many users?
 sentence 2: How did Quora get initial traction?
not same meaning
not same meaning
not same meaning