sentence 1: How do I know if I'm good?
 sentence 2: How do I know what I'm good at? sentence 1: What was the exact method by which Hubble discovered the red-shift of distant galaxies?
 sentence 2: How do we know the bright spots in the HST Hubble Deep Field are galaxies and not stars? sentence 1: What are some things new employees should know going into their first day at EP Energy?
 sentence 2: What are some things new employees should know going into their first day at CMS Energy?
not same meaning
not same meaning
not same meaning