On the left side of this figure we see Alice looking rightwards at Bob, who is looking leftwards back at Alice. A blue arrow labeled "I am Alice" points rightward from Alice to Bob. Below them, Trudy looks on but is excluded. On the right side of the figure, we see Alice and Bob and Trudy again, however this time the blue arrow labeled "I am Alice" points from Trudy diagonally upward to the right towards Bob.