sentence 1: How do I know if I'm good?
 sentence 2: How do I know what I'm good at? sentence 1: What is the best way to get rid of mouth sores?
 sentence 2: What are the best ways to get rid of mouth sores? sentence 1: What are some of the best optical illusions?
 sentence 2: How do optical illusions work? sentence 1: How did chopsticks get their name?
 sentence 2: Where did chopsticks get their name? sentence 1: What are the pros and cons of buying a used car from a rental agency directly? (example: buying an Accord from Hertz Used Car Sales)
 sentence 2: Is buying used cars from Avis or Hertz a good idea?
not same meaning
same meaning
not same meaning
same meaning
same meaning