A geocentric theory necessarily committed to Hesperus cannot thereby incur commitment to Phosphorus without collapsing the epistemic access condition that grounds ontological commitment attributions in the first place.

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Epistemic access condition(as used in epistemology and metaphysics): The requirement that we can actually know about or have evidence for something before we're justified in claiming it exists.
Geocentric theory(as used in history of astronomy and philosophy of science): The old idea that Earth is at the center of the universe with everything else orbiting around it.
Hesperus(Standard example in philosophy of language): A proper name used to designate the evening star (the planet Venus), functioning as a rigid designator
Necessarily committed(as used in logic and metaphysics): Something that *must* follow as a logical consequence—you can't avoid it once you accept certain starting ideas.
Phosphorus(Standard example in philosophy of language): A proper name used to designate the morning star (the planet Venus), functioning as a rigid designator
ontological commitment(Used to derive that literal truth of 'a is F' entails existence of a): The criterion by which acceptance of a sentence as literally true commits one to the existence of the objects referred to by singular terms in that sentence, provided the sentence cannot be paraphrased away.

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