The circularity supported in programming, that programs ("quines") can refer to their own source code, illustrates the same issue at heart. Yusuke Endoh created

The circularity supported in programming, that programs ("quines") can refer to their own source code, illustrates the same issue at heart. Yusuke Endoh created a tantalizing Ouroboros quine cycling through 128 languages: https://github.com/mame/quine-relay https://github.com/mame/quine-relay