sentence 1: How do I know if I'm good?
 sentence 2: How do I know what I'm good at? sentence 1: When there is no light bulb in the the socket but the light switch is on, is electricity being used?
 sentence 2: Can you use light dimming switch for CFL light bulbs? sentence 1: What happened to the periods in the U.S.A.?
 sentence 2: What is karyomorphology?
not same meaning
not same meaning
not same meaning