Also see Adrian Thompson's Xilinx 6200 FPGA, programmed by a genetic algorithm that worked but exploited nuances unique to that specific physical chip, meaning the software couldn't be copied to another chip. https://news.ycombinator.com/item?id=43152877

2000s movie line territory:

> There have always been ghosts in the machine. Random segments of code, that have grouped together to form unexpected protocols.