Now, a clever man would put the poison into his own goblet, because he would know that only a great fool would reach for what he was given. I am not a great fool, so I can clearly not choose the wine in front of you. But you must have known I was not a great fool; you would have counted on it; so I can clearly not choose the wine in front of me!
— Vizzini, The Princess Bride
Subject 1: I know what you're thinking.
Subject 2: I know that you know what I'm thinking.
Subject 1: I know that you know that I know what you're thinking.
Subject 2: I know that you know that I know that you know what I'm thinking.
Little does she know
That I know that she knows
That I know she's two-timing me.
— "Little Does She Know", The Kursaal Flyers
"I know you know I know you know, 'cause I just told you!"
"A pattern... Something he could sink his teeth into. These tactics, these plans they were all patterns of overlapping tricks and counter-tricks. A plan was made, the opponent would plan a counter, then he'd have to counter that counter, and the opponent was usually sitting at step three waiting to deal with the counter's counter. If he wanted to win this, he needed to be four moves ahead of the current game pieces."
I know. You know I know. I know you know I know. We know Henry knows, and Henry knows we know it. We're a knowledgeable family.
— Prince Geoffrey, The Lion in Winter
I know you know that I'm not telling the truth
I know you know that they just don't have any proof
Embrace the deception, learn how to bend
"We must cooperate to destroy Sunshine, and only then fight it out between us. But if one of us betrays the other earlier on, that one could gain an advantage in the later fight. And the Sunshine General, who knows all this, will try to trick each of us into thinking the other has betrayed them. And you and I, who know that, will be tempted to betray the other and pretend that it is Granger's trickery. And Granger knows that, as well"
Draco nodded. That much was obvious.
I hear you've been investigating my ships. And I think you know that I know that you know, you know?
— Varrick, The Legend of Korra