That is because there isn't one. Analogies for software are notoriously imprecise but... You wouldn't pound in a nail with a sawzall. Trying to be pure with an

That is because there isn't one. Analogies for software are notoriously imprecise but... You wouldn't pound in a nail with a sawzall. Trying to be pure with any style leads to awkward code in anything but the most straightforward tasks. Do what works, be like water etc.