1 Ishmael: Don't say you're simple-minded!
2 Martian 1: But we are. Our minds work on electrochemical principles, with reaction pathways forming an organic neural network.
3 Martian 1: The principles are all quite trivial. It's somewhat embarrassing, actually. How do human minds work?
4 Ishmael: Uh…
4 Martian 2: Too complex for you to even explain at our level, we see.

Or as Wikipedia calls them, a biological neural network. So simple even a baby could understand it.