# Turtles all the way down (logic) |  | "**Turtles all the way down**" is an expression of the problem of infinite regress. The saying alludes to the mythological idea of a World Turtle that supports a flat Earth on its back. It suggests that this turtle rests on the back of an even larger turtle, which itself is part of a column of increasingly larger turtles that continues indefinitely. | |-|-| | | wikipedia:: [Turtles all the way down](https://en.wikipedia.org/wiki/Turtles_all_the_way_down) | an [[Infinite Regress]]