Brainfuck is a useful language for evolutionary programming because it is Turing complete, it has few instructions, the interpreter is easy to implement, and a

Brainfuck is a useful language for evolutionary programming because it is Turing complete, it has few instructions, the interpreter is easy to implement, and a mutation operator is also easy to implement. There are different ways to deal with bounds checking when moving the tape: saturation, wrapping and invalidation. I often chose to invalidate a program that crosses bounds, as it usually generates a cleaner program that is more compatible with other interpreters as well. In the paper the part that's interesting is that there was no explicit fitness functions. The higher fitness emerges in the form of the replicator. https://www.youtube.com/watch?v=eOHGBuZCswA https://www.youtube.com/watch?v=eOHGBuZCswA