Full disclosure: I am not a theologian. I am a philosopher of religion who, as part of his task, thinks about theologoumena which, on a broad interpretation of the term, are simply things said about God, a term which therefore includes not only official, dogmatic pronunciamenti of, say, the RCC's magisterium, but also includes conjectures, speculations, and opinions about God that are not officially promulgated.

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Anthony Flood writes,

The Christian worldview, expressed on the pages of the Bible, is a revelatory “package deal,” if you will, not a buffet of optional metaphysical theses. The organic connectedness (within the divine decree) of creation, trinity, and incarnation—even the so-called “contingencies of history,” e.g., Joshua’s impaling the King of Ai on a pole after slaughtering all of his subjects (Joshua 8)—await clarification in God’s good time, if He sees fit to provide it, but are put before us for our assent today.

Flood is a presuppositionalist who believes that "intelligible predication" presupposes the truth of the Christian worldview.  Thus, "The Christian does not avail himself of his birthright (Christian theistic) worldview because it confers omniscience on him, but rather because (a) it saves intelligible predication and (b) no competing worldview does."

We are being told that the Christian worldview, as Flood understands it, offers the best and indeed the only explanation of the fact of intelligible predication.  That intelligible predication is indeed a fact I do not question. But I do have some questions about Flood's explanation of the fact. One of them concerns what he includes in his explanation.  It is clear that he includes more than the existence of God where 'God' refers to a purely spiritual being, of a personal nature, endowed with the standard omni-attributes, who exists of metaphysical necessity, and who created out of nothing everything distinct from himself, or at least everything concrete distinct from himself. One reason for this 'more' is because Flood's God is not just personal, but tri-personal: one God in three divine persons. This is not intended as tri-theism, of course, but as monotheism: one God in three divine persons. 

Furthermore, in the Christian worldview as Flood understands it, the second person of the Trinity, variously known as the Logos, the Word, God the Son, became man in a particular man, Jesus of Nazareth, at a particular time in a particular place. One and the same person, the Son, without ceasing to be fully divine, became fully human, with a human body and a human soul, by being born of a virgin named 'Mary' in a stable in Bethlehem.  So it seems that the 'package deal' must include, in addition to Trinity and Incarnation, some version of Mariology.  Why must it? Because Jesus Christ, the God-Man, had to have gotten his human nature from somewhere. He inherited his human nature from his human mother.

Let's think about this.  God the Son is not a creature. Is Jesus a creature? His earthly mother is a creature. Jesus had no heavenly mother, at least not until the Assumption of Mary, body and soul, into heaven.  But that was long after the Incarnation event; I won't say anything more about the Assumption here. And Jesus had no earthly father. Joseph was his step-father, and a step-father is not a father in the earthly or biological sense of the term. The father of Jesus is a purely spiritual being.  So Jesus Christ, the God-Man, at the moment of Incarnation, has a heavenly father but no earthly father, and an earthly mother but no heavenly mother.

Mary became pregnant.  What was the nature of the inseminating seed? It had to be purely spiritual. Why? Because it came from God who is purely spiritual. What about the inseminated egg? It had to be physical. Why? Because it was the ovum of an earthly woman. It was a miraculous pregnancy by supernatural agency.

Now the God-Man had to be free of original sin to be able to do his redemptive work and restore right relations between man and God. So he could not have 'contracted' original sin from his earthly mother. Hence the logic of the soteriological narrative required that Mary be conceived without original sin. Hence the doctrine of the Immaculate Conception.

It therefore seems that Mariology must be part of Flood's 'package deal,' and indeed a Mariology that includes Immaculate Conception.  So my first question to Flood is this:

Do you hold that the only possible explanation of  intelligible predication must be in terms of a Christian worldview that includes not only Trinity and Incarnation but also Immaculate Conception?

This is not a rhetorical question. It is a genuine question raised so that I might understand what exactly Flood's position is.  Tony is making a mistake if he thinks I am being polemical here. I am not. I honestly find presuppositionalism puzzling and I am trying to understand it.

My second question to Flood which I cannot develop and defend in this installment is this:

Given the well-known logical conundra that arise when we try to render intelligible to ourselves such doctrines as Trinity and Incarnation, conundra that seem to threaten the intelligibility of these doctrines, and therefore seem to threaten the intelligibility of any explanation of intelligible predication in terms of a worldview committed to them, how do you respond?  Do you maintain that the supposed logical puzzles are easily solved and that Trinity and Incarnation in their orthodox formulations are logically and epistemically unobjectionable? If that is not the tack you take, what tack do you take?