From https://news.ycombinator.com/item?id=13067481

> Yeah, the ML is still in it's infancy... To address that, I built in some more randomness into the algorithm so the initial logo designs can just get the user thinking and then we can get a better sense of their taste as they favorite logos. Without that randomness, the algorithm tries and fails horribly at creating logos.

Some variation of rand() indeed!

Not sure why you were downvoted, in this case that's a real possibility. It's hard to beat rand() for MVP.