sentence 1: How do I know if I'm good?
 sentence 2: How do I know what I'm good at? sentence 1: What defines "excellent bone structure"?
 sentence 2: How do you define good looks universally? sentence 1: How can you tell if a woman is a gold digger?
 sentence 2: How do I weed out gold diggers?
not same meaning
not same meaning
not same meaning