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 one get a patent?
 sentence 2: Can I get patent for a simple idea? sentence 1: Do you become more disciplined as you age? How do I become more disciplined?
 sentence 2: How can I learn to become more disciplined? sentence 1: Which is best os for hacking?
 sentence 2: Which os is good for hacking? sentence 1: What is an operational amplifier circuit?
 sentence 2: What is an operational amplifier?
not same meaning
not same meaning
same meaning
same meaning
same meaning