sentence 1: How do I know if I'm good?
 sentence 2: How do I know what I'm good at? sentence 1: How can I prevent certain friends from seeing me comment on public posts on Facebook?
 sentence 2: How do you prevent a friend on Facebook from seeing what you like or comment on other people's posts? sentence 1: How can I slowly lose weight?
 sentence 2: I'm overweight. How can I begin to lose weight? sentence 1: What is the meaning or purpose of life?
 sentence 2: What's the meaning of life? sentence 1: How does Dominos Pizza's "30 minutes or free" scheme work?
 sentence 2: How much does a dominos pizza actually cost?
not same meaning
same meaning
same meaning
same meaning
not same meaning