Originally Posted by a d e p t
Suppose that, somewhere in New Jersey, there is a hotel with an infinite number of rooms.
You arrive late one night and ask the front desk clerk if they have a vacancy. He replies that every room is occupied, however, he can arrange for you to get one. But how, you wonder, if there is no vacancy? The answer is simple: the clerk will simply ask the people in room 1 to move to room 2, those in room 2 to move to room 3, those in 3 to move to room 4, and so on. Since there is an infinite number of rooms, everyone will have a room to move into, and room 1 will be available for you.
Hotel Infinity is an amazing place, you think to yourself as you sign in. But just as the clerk is about to give you your key, an infinite number of people arrive for an APA convention. The clerk cleverly figured out how to get you a room, but can he accommodate an additional infinity of guests?