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Like when your grandma tells you the sky is blue right before you go to bed; it's the most pointless, obvious info ever given to you.
Hey bro, I told you I was going to the store, and you said, 'A+ for the info, I knew that already.'
Your mom said, 'A+ for the info, I saw you eating pizza.'
Your teacher said, 'A+ for the info, I can see your face.'