• The Laws of Logic
• Christianity's distinctive, characteristic beliefs

• the Son and the Spirit are mere emanations from the Father
• emanations of a thing are not the full thing in itself
• if something is not the full thing, there is more outside of it
• if there is God outside of the Son and the Spirit, there may as well be God outside the Father
• if there is God outside all three members, then God exists outside the three members
• If the above is true, God exists outside Father, Son, and Spirit

∴ God exists outside Father, Son, and Spirit

Gnosticism

x God exists outside Father, Son, and Spirit

Is this the argument as Gnostics would present it? This is not a proof: the use of “may” makes it more of a suggestion.