If human nature's teleological structure is doing the justificatory work, then the practical principles are not truly self-evident but functionally derived from metaphysical biology.

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Doing the justificatory work(as used in epistemology and philosophy of logic): Serving as the reason or explanation that makes something true or right—if X 'does the justificatory work,' it means X is what actually supports or proves the claim.
Functionally derived(as used in philosophy of logic and metaphysics): Obtained or created as a result of how something actually works in practice, rather than being independent or fundamental on its own.
Human nature(as used in metaphysics and philosophy of human identity): The fundamental characteristics, qualities, or essence that make something human and typically shared by all humans.
Metaphysical biology(as used in metaphysics): The philosophical study of what living things are fundamentally like and how their nature and purposes are structured at the deepest level.
Practical principles(as used in ethics): Rules or guidelines for how people should actually act and behave in real life, rather than abstract truths about the world.
Teleological structure(describing how the natural order is supposedly organized): The idea that nature or the world is organized around specific goals or purposes—like a machine designed to reach certain ends.
self-evident(Reid's epistemology, critiquing the skeptic's reliance on logical principles): A belief or principle is self-evident when we cannot help but accept it; self-evidence does not constitute a non-circular justification of the belief or principle.

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