There's only one of those "friends" (FlooP): Hofstadter explained that there is no more powerful "GlooP" language, because FlooP turns out to be as powerful as

There's only one of those "friends" (FlooP): Hofstadter explained that there is no more powerful "GlooP" language, because FlooP turns out to be as powerful as any computing formalism that can be implemented on a computer. https://en.wikipedia.org/wiki/BlooP_and_FlooP https://en.wikipedia.org/wiki/BlooP_and_FlooP