The things I’ve studied in great detail are large-scale morphological features like, for example, shapes of leaves. So when it comes to looking up mollusc pigmentation, I look at a pattern and it’s very easy to see what class of programs [are appropriate]. It turns out you can also look at networks with simple programs. You might end up with [a visual pattern] that represents some operation such as phosphorylation or some other biochemical pathway. I’m talking about networks of chemical reactions rather than about the morphological layout of things.