“...you know?”
“You know that I know you know, but I want you to know that I know you know I know you know I know. It’s important for you to know that, you know?”
“On Knowledge: You know that I know you know, but I want you to know that I know you know I know you know I know. It’s important for you to know that, you know?”
“The more you know, the more you know you don't know and the more you know that you don't know.”
“The moment you know you know you know.”
“If you think you know everything; you know nothing. If you think you know nothing; you know something.”
“They say you don't know what you don't know until you know that you don't know it.”