The discussion revolves around the riddle of determining what is 90 degrees from infinity. Participants explore the concept using the complex plane, suggesting that a 90-degree rotation from positive infinity leads to a simpler answer. The conversation hints that the answer is a number less than 10, with specific references to the value 8, which, when rotated 90 degrees, visually resembles infinity. The mathematical aspect includes mentions of arctangent and radians, but the focus remains on the riddle-like nature of the question rather than strict mathematical definitions. Humor is also present, with a playful exchange about numbers.