sentence 1: How do I know if I'm good?
 sentence 2: How do I know what I'm good at? sentence 1: Do astronauts use quora in space?
 sentence 2: Do astronauts in space use Quora? sentence 1: Why are gay men feminine and lesbians masculine?
 sentence 2: Why are most gay men so feminine? sentence 1: How will I know that am taking right decision?
 sentence 2: How do we know if we are making the right decision?
not same meaning
not same meaning
same meaning
same meaning