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This phrase was born in the chaotic hallways of EHS when someone needed a good come-back to shut someone else up for good.
"I know this!" he yelled, right after the teacher said he had to do 10 more math problems.
"I know this!" she screamed, after her brother asked for the 5th time what the word 'alright' meant.
"I know this!" he shouted, after his mom told him for the 10th time to put his shoes on.