I found myself imaging someone writing down a recipe for yogurt like so: 1) Heat up milk 2) Find something with the consistency of yogurt to put into the milk

I found myself imaging someone writing down a recipe for yogurt like so: 1) Heat up milk 2) Find something with the consistency of yogurt to put into the milk 3) Wait Having a living thing there that knows what the final product should be and can stand as an example is largely how we transfer culture.