Yes, I think it's very possible that human brains unconsciously generate-and-test surprisingly large numbers of small candidate programs when solving a problem.

Yes, I think it's very possible that human brains unconsciously generate-and-test surprisingly large numbers of small candidate programs when solving a problem. This approach is https://en.wikipedia.org/wiki/Embarrassingly_parallel https://en.wikipedia.org/wiki/Embarrassingly_parallel, which is a good fit for biological neural architectures, which have very many computing nodes but each node is very slow (compared to electronic computer CPUs/GPUs).