" While Elizabeth was fast to catch on to engineering concepts, Sunny was often out of his depth during engineering discussions. To hide it, he had a habit of repeating technical terms he heard others using. During a meeting with Arnav’s team, he latched onto the term “end effector,” which signifies the claws at the end of a robotic arm. Except Sunny didn’t hear “end effector,” he heard “endofactor.” For the rest of the meeting, he kept referring to the fictional endofactors. At their next meeting with Sunny two weeks later, Arnav’s team brought a PowerPoint presentation titled “Endofactors Update.” As Arnav flashed it on a screen with a projector, the five members of his team stole furtive glances at one another, nervous that Sunny might become wise to the prank. But he didn’t bat an eye and the meeting proceeded without incident. After he left the room, they burst out laughing. "

― John Carreyrou , Bad Blood: Secrets and Lies in a Silicon Valley Startup