• The statement that Jesus was 100% human and 100% God while humans can sin and God cannot sin presents one such challenge.
  • Jesus’ divine nature, which cannot sin, remains intact and unaffected by His human nature’s susceptibility to sin.
  • The belief that Jesus’ humanity does not imply He sinned, aligning with the view that His divine nature was sinless.
  • Jesus voluntarily relinquished some of His divine attributes to fully experience human life.
  • The Holy Spirit guided and empowered Jesus, enabling Him to resist sin despite His human nature.
  • Finite human logic cannot fully grasp the infinite nature of God, and therefore, the coexistence of Jesus’ humanity and divinity, including His sinlessness, is a divine mystery to be accepted by faith.
  1. What are the ways a believer in Christianity might explain or explain away the following apparent logical contradiction?
    1. Ways a Believer in Christianity Might Address the Apparent Logical Contradiction
      1. 1. Hypostatic Union
      2. 2. Sinlessness of Jesus
      3. 3. Kenosis Theory
      4. 4. The Role of the Holy Spirit
      5. 5. Mystery of Faith
      6. 6. Distinct Roles of Natures
    2. Reconciling the Duality: Jesus, Humanity, and Divinity
  2. Consider the syllogistic formulation of the reductio argument.
    1. Explanation
    2. Potential Syllogistic Responses Supporting the Belief that Jesus Was Both 100% Human and 100% God
      1. Response 1: Hypostatic Union
      2. Response 2: Sinlessness of Jesus
      3. Response 3: Role of the Holy Spirit
      4. Response 4: Mystery of Faith
  3. Elaborate on why the following does or does not clearly demonstrate a logical contradiction.
    1. Analysis of Logical Contradiction
    2. Premises:
    3. Syllogism:
    4. Evaluation:
    5. Explanation:
  4. Are these 2 arguments parallel? If so, since you have determined the argument in the left column to be a logical contradiction, you must also do the same with the parallel argument in the right column. Right?
    1. Analysis of Parallel Arguments
      1. Man/Woman Syllogism
      2. Human/God Syllogism
      3. Parallelism and Logical Consistency
  5. Take the expected counters to the Human/God reductio and attempt to create parallel counters for the Man/Woman reductio.
    1. Expected Counters to the Human/God Reductio and Parallel Counters for the Man/Woman Reductio
    2. Syllogistic Formulations for Man/Woman Reductio Counters
  6. Quizzes
  7. Provide 15 discussion questions relevant to the content above.
    1. Discussion Questions
    2. 15 Discussion Questions on the Nature of Jesus and Logical Reasoning
  8. Appendix:
    1. Summary:
  9. Technical Version:
  10. Attempted Counters to the Analogy
    1. Analyzing the Strength of the Analogy Between Human/God and Man/Woman Reductio Counters
      1. Understanding the Reductio and Its Counters
      2. Analyzing the Analogy
      3. Strengths of the Analogy
      4. Weaknesses of the Analogy
      5. Conclusion

What are the ways a believer in Christianity might explain or explain away the following apparent logical contradiction?

  • Jesus was 100% human and 100% God.
  • Humans can sin.
  • God cannot sin.

Consider the syllogistic formulation of the reductio argument.


Premises:

  1. Humans can sin.
  2. God cannot sin.
  3. Assume: Jesus was 100% human and 100% God.

Syllogism:

  1. Humans can sin. (Given)
  2. God cannot sin. (Given)
  3. Assume: Jesus was 100% human and 100% God. (Assumption for reductio)
  4. If Jesus was 100% human, he could sin. (From 1 and 3)
  5. If Jesus was 100% God, he could not sin. (From 2 and 3)
  6. Jesus could sin and could not sin. (From 4 and 5)
  7. This is a contradiction. (From 6)
  8. Therefore, our assumption (3) must be false.
  9. Jesus could not be both 100% human and 100% God. (Negation of 3)

Conclusion:
It is logically impossible for Jesus to be both 100% human and 100% God.

Explanation

This revised reductio ad absurdum argument demonstrates:

  1. We start with the given premises about the sinning capabilities of humans and God.
  2. We assume that Jesus is both 100% human and 100% God.
  3. This assumption leads to a logical contradiction: Jesus would simultaneously have the ability to sin (from his human nature) and the inability to sin (from his divine nature).
  4. Since this results in a contradiction, we must conclude that the initial assumption is false.
  5. Therefore, the only logically consistent position is that Jesus could not be both 100% human and 100% God.

This revision highlights the logical incompatibility of the concept of Jesus being both fully human and fully divine, given the premises about the nature of humanity and divinity in relation to sin. It demonstrates that the initial claim leads to a logical impossibility, thus requiring us to reject the premise that Jesus could be both 100% human and 100% God.


Based on the argument above, offer potential syllogistic responses from the side of the person accepting that Jesus was both 100% human and 100% God.


Elaborate on why the following does or does not clearly demonstrate a logical contradiction.

  1. Women can bear children. (Given)
  2. Men cannot bear children. (Given)
  3. Assume: Pat is 100% a woman and 100% a man. (Assumption for reductio)
  4. If Pat is 100% a woman, Pat can bear children. (From 1 and 3)
  5. If Pat is 100% a man, Pat cannot bear children. (From 2 and 3)
  6. Pat can bear children and cannot bear children. (From 4 and 5)
  7. This is a contradiction. (From 6)
  8. Therefore, our assumption (3) must be false.
  9. Pat cannot be both 100% a woman and 100% a man. (Negation of 3)

Are these 2 arguments parallel? If so, since you have determined the argument in the left column to be a logical contradiction, you must also do the same with the parallel argument in the right column. Right?

Man/Woman SyllogismHuman/God Syllogism
Premises:Premises:
1. Pat is 100% a woman and 100% a man.1. Jesus was 100% human and 100% God.
2. Women can bear children.2. Humans can sin.
3. Men cannot bear children.3. God cannot sin.
Syllogism:Syllogism:
1. Women can bear children. (Given)1. Humans can sin. (Given)
2. Men cannot bear children. (Given)2. God cannot sin. (Given)
3. Assume: Pat is 100% a woman and 100% a man. (Assumption for reductio)3. Assume: Jesus was 100% human and 100% God. (Assumption for reductio)
4. If Pat is 100% a woman, Pat can bear children. (From 1 and 3)4. If Jesus was 100% human, he could sin. (From 1 and 3)
5. If Pat is 100% a man, Pat cannot bear children. (From 2 and 3)5. If Jesus was 100% God, he could not sin. (From 2 and 3)
6. Pat can bear children and cannot bear children. (From 4 and 5)6. Jesus could sin and could not sin. (From 4 and 5)
7. This is a contradiction. (From 6)7. This is a contradiction. (From 6)
8. Therefore, our assumption (3) must be false.8. Therefore, our assumption (3) must be false.
9. Pat cannot be both 100% a woman and 100% a man. (Negation of 3)9. Jesus could not be both 100% human and 100% God. (Negation of 3)
Conclusion:Conclusion:
It is logically impossible for Pat to be both 100% a woman and 100% a man.It is logically impossible for Jesus to be both 100% human and 100% God.


Take the expected counters to the Human/God reductio and attempt to create parallel counters for the Man/Woman reductio.


Quizzes


Provide 15 discussion questions relevant to the content above.


Appendix:

To restructure the formulation of the argument in symbolic logic, we will introduce symbolic representations of the key propositions and use logical operators to outline the structure.

Man/Woman Syllogism in Symbolic Logic:

Let’s define the following symbols for the Man/Woman Syllogism:

  • W(x): x is a woman.
  • M(x): x is a man.
  • B(x): x can bear children.
  • \neg: negation (“not”)
  • \land: conjunction (“and”)
  • \rightarrow: implication (“if…then”)

Premises:

  1. W(P) \land M(P) (Pat is 100% a woman and 100% a man)
  2. W(x) \rightarrow B(x) (If x is a woman, x can bear children)
  3. M(x) \rightarrow \neg B(x) (If x is a man, x cannot bear children)

Syllogism:

  1. W(P) \rightarrow B(P) (If Pat is a woman, Pat can bear children)
  2. M(P) \rightarrow \neg B(P) (If Pat is a man, Pat cannot bear children)
  3. B(P) \land \neg B(P) (Contradiction: Pat can bear children and cannot bear children)

Conclusion:

  1. \neg (W(P) \land M(P)) (It is impossible for Pat to be both 100% a woman and 100% a man)

Human/God Syllogism in Symbolic Logic:

For the Human/God Syllogism, we will define the following symbols:

  • H(x): x is human.
  • G(x): x is God.
  • S(x): x can sin.
  • \neg: negation (“not”)
  • \land: conjunction (“and”)
  • \rightarrow: implication (“if…then”)

Premises:

  1. H(J) \land G(J) (Jesus is 100% human and 100% God)
  2. H(x) \rightarrow S(x) (If x is human, x can sin)
  3. G(x) \rightarrow \neg S(x) (If x is God, x cannot sin)

Syllogism:

  1. H(J) \rightarrow S(J) (If Jesus is human, He can sin)
  2. G(J) \rightarrow \neg S(J) (If Jesus is God, He cannot sin)
  3. S(J) \land \neg S(J) (Contradiction: Jesus can sin and cannot sin)

Conclusion:

  1. \neg (H(J) \land G(J)) (It is impossible for Jesus to be both 100% human and 100% God)

Summary:

By reducing these arguments to symbolic logic, the contradictions become clear. In both cases, assuming an entity is 100% two contradictory things (woman/man or human/God) leads to an inherent contradiction. Therefore, the initial assumption must be rejected to maintain logical consistency.


Technical Version:

Let:

  • H(x): x is a human being.
  • G(x): x is a divine being (God).
  • C(x): x can sin.
  • N(x): x cannot sin.

Premises:

  1. All humans can sin.
    \forall x [H(x) \rightarrow C(x)]
  2. God cannot sin.
    \forall x [G(x) \rightarrow N(x)]
  3. No being can both be able to sin and unable to sin simultaneously.
    \forall x [\neg (C(x) \land N(x))]

Assumption (for contradiction):

  1. There exists a being who is both fully human and fully divine (e.g., Jesus).
    \exists x [H(x) \land G(x)]

Derivation:

  1. From (4) and (1): Since H(x), then C(x).
    H(x) \rightarrow C(x) (from Premise 1)
    H(x) (from Assumption 4)
    C(x)
  2. From (4) and (2): Since G(x), then N(x).
    G(x) \rightarrow N(x) (from Premise 2)
    G(x) (from Assumption 4)
    N(x)
  3. From (5) and (6): C(x) \land N(x).
    C(x) \land N(x)
  4. From (3): \neg (C(x) \land N(x)).
    \neg (C(x) \land N(x)) (from Premise 3)
  5. Contradiction between (7) and (8).
    Contradiction: (C(x) \land N(x)) \land \neg (C(x) \land N(x))

Conclusion:

  • The assumption in (4) leads to a contradiction.
  • Therefore, no being can be both fully human and fully divine.
  • Thus, the hypostatic union is logically inconsistent when considering the premises that humans can sin and God cannot sin.

Attempted Counters to the Analogy

Appendix: Rigorous Examination of the Hypostatic Union and Logical Consistency

This appendix addresses a rigorous examination of the hypostatic union doctrine—the claim that Jesus is simultaneously fully human and fully divine. This analysis highlights the core logical challenges, responding to common theological explanations and analogies that aim to resolve the apparent contradictions inherent in this doctrine. We will explore the critical points of contention, the limitations of “switching” or “suppressing” natures, the inadequacy of illustrative analogies, and the necessary logical conclusions.


1. Core Contradiction: The Incompatibility of Human and Divine Attributes

The hypostatic union posits that Jesus possesses two complete, fully embodied natures—human and divine—unified in one person. However, inherent to these natures are mutually exclusive attributes: humans have the capacity to sin (C), while Gods have the incapacity to sin (N). This creates a logical tension: if Jesus is fully human, he must fully possess the capacity to sin (H(J) \rightarrow C(J)). If he is fully divine, he must fully embody the incapacity to sin (G(J) \rightarrow N(J)). Possessing both C and N simultaneously is contradictory (C(J) \wedge N(J) \rightarrow \perp), as shown in the symbolic logic formulation below.


2. Analysis of “Switching” or “Suppressing” Natures

To address this contradiction, some theologians propose that Jesus “switches” between his human and divine natures, selectively “suppressing” one nature while embodying the other. This view suggests that Jesus, while on earth, can embody his human limitations (such as hunger, pain, and limited knowledge) by suppressing his divine attributes, then “switch” to his divine nature when necessary, thereby avoiding contradiction.

However, selective suppression or “switching” undermines the claim that Jesus fully possesses both natures simultaneously. It implies a form of selective embodiment rather than the unity of two fully embodied natures. To clarify, if Jesus can simply switch from human to divine attributes as needed, he does not fully embody both natures at all times; rather, he embodies aspects of each situationally, thereby compartmentalizing his identity. This selective embodiment implies a division, contradicting the hypostatic union, which asserts that Jesus is unified in one person who is fully human and fully divine at every moment.


3. Illustrative Analogies and Their Limitations

Several analogies are often used to explain the hypostatic union, yet they fail to resolve the underlying logical inconsistency:

  • Emergency Responder Analogy: Some suggest that Jesus, like an emergency responder who can speed while on duty but obeys speed limits off-duty, adopts human limitations when acting within his human nature and divine attributes when acting within his divine nature. This analogy, however, falls short because it only addresses situational permissions rather than fully embodied, inherent attributes. The emergency responder does not embody both lawful and unlawful behaviors simultaneously; he merely shifts behavior based on context, which does not reflect the hypostatic union’s claim of unified possession of incompatible attributes.
  • Avatar or Body Occupation Analogy: Another analogy likens Jesus’ two natures to a character occupying two forms, such as an avatar, with the human form dormant while in the divine state and vice versa. This analogy implies that Jesus’ two natures are distinct entities or modes, essentially alternating between roles. This perspective, however, risks fragmenting Jesus’ identity into two compartmentalized entities, contradicting the hypostatic union’s assertion that Jesus embodies both natures as a single, unified person.

4. Critical Analogy: The Fully Male and Fully Female Example

To illustrate the inherent logical tension, consider a hypothetical person who claims to be fully male and fully female. Certain attributes, such as the biological ability to bear children, are intrinsic to femaleness but incompatible with maleness. If this individual claimed to suppress or switch between these characteristics at will, it would not resolve the contradiction but merely indicate selective expression rather than unified identity. In other words, the individual would not fully embody both genders at all times.

Similarly, if Jesus is both fully human and fully divine, he must embody the inherent attributes of each nature simultaneously. Being human means having the capacity to sin, while being divine means having the incapacity to sin. Selective suppression or “switching” fails to unify these natures, as it implies compartmentalization rather than true union.


5. Formal Symbolic Logic Analysis

Below is a symbolic logic formulation of the argument to demonstrate the inherent contradiction within the hypostatic union doctrine.

Definitions and Predicates

Let:

  • H(x): x is human
  • G(x): x is God
  • C(x): x has the capacity to sin
  • N(x): x has the incapacity to sin
  • F(x): x is fully (100%) possessing all attributes of the defined nature
  • S(x, y): x can suppress or switch nature y at will
Assumptions and Statements
  1. Humans have the capacity to sin:
    • \forall x (H(x) \rightarrow C(x))
  2. Gods have the incapacity to sin:
    • \forall x (G(x) \rightarrow N(x))
  3. To be fully human, one must fully possess the attributes of human nature (including the capacity to sin):
    • \forall x (F(x) \wedge H(x) \rightarrow C(x))
  4. To be fully God, one must fully possess the attributes of divine nature (including the incapacity to sin):
    • \forall x (F(x) \wedge G(x) \rightarrow N(x))
  5. Jesus is fully human and fully God:
    • F(J) \wedge H(J) \wedge F(J) \wedge G(J)
  6. If a being has the capacity to sin, they cannot also have the incapacity to sin simultaneously:
    • \forall x (C(x) \wedge N(x) \rightarrow \perp)
      (where \perp denotes a contradiction)
  7. Switching or suppressing a nature to resolve incompatible attributes results in selective embodiment rather than full simultaneous possession:
    • \forall x, y (S(x, y) \rightarrow \neg(F(x) \wedge F(y)))
Logical Derivation of the Contradiction
  1. Assume Jesus is fully human and fully God:
    • F(J) \wedge H(J) \wedge F(J) \wedge G(J)
  2. Since Jesus is fully human, he must fully possess the capacity to sin:
    • H(J) \Rightarrow C(J)
    • Therefore, C(J)
  3. Since Jesus is fully God, he must fully possess the incapacity to sin:
    • G(J) \Rightarrow N(J)
    • Therefore, N(J)
  4. This leads to a contradiction:
    • C(J) \wedge N(J) \Rightarrow \perp
    • Therefore, \perp (contradiction)
  5. Attempting to “suppress” or “switch” natures implies selective embodiment and undermines full possession of both natures simultaneously:
    • S(J, H) \vee S(J, G) \Rightarrow \neg(F(J) \wedge F(H) \wedge F(G))

6. Logical Consistency and Necessary Conclusions

To preserve logical consistency within the hypostatic union doctrine, one of the following foundational statements must be reconsidered:

  1. Jesus is not fully human (\neg (F(J) \wedge H(J))).
  2. Jesus is not fully God (\neg (F(J) \wedge G(J))).
  3. Humans do not inherently possess the capacity to sin (\neg \forall x (H(x) \rightarrow C(x))).
  4. Gods do not inherently lack the capacity to sin (\neg \forall x (G(x) \rightarrow N(x))).

Without revisiting these assumptions, the doctrine of the hypostatic union, which posits a single person fully embodying incompatible natures, remains logically inconsistent. Attempts to “suppress” or “switch” natures result in selective embodiment, failing to satisfy the doctrine’s claim of a unified divine-human identity.


Conclusion

In summary, this examination reveals that the traditional understanding of the hypostatic union faces a significant logical challenge. To salvage logical coherence, one must reconsider one of the doctrine’s foundational claims

  1. What are the ways a believer in Christianity might explain or explain away the following apparent logical contradiction?
    1. Ways a Believer in Christianity Might Address the Apparent Logical Contradiction
      1. 1. Hypostatic Union
      2. 2. Sinlessness of Jesus
      3. 3. Kenosis Theory
      4. 4. The Role of the Holy Spirit
      5. 5. Mystery of Faith
      6. 6. Distinct Roles of Natures
    2. Reconciling the Duality: Jesus, Humanity, and Divinity
  2. Consider the syllogistic formulation of the reductio argument.
    1. Explanation
    2. Potential Syllogistic Responses Supporting the Belief that Jesus Was Both 100% Human and 100% God
      1. Response 1: Hypostatic Union
      2. Response 2: Sinlessness of Jesus
      3. Response 3: Role of the Holy Spirit
      4. Response 4: Mystery of Faith
  3. Elaborate on why the following does or does not clearly demonstrate a logical contradiction.
    1. Analysis of Logical Contradiction
    2. Premises:
    3. Syllogism:
    4. Evaluation:
    5. Explanation:
  4. Are these 2 arguments parallel? If so, since you have determined the argument in the left column to be a logical contradiction, you must also do the same with the parallel argument in the right column. Right?
    1. Analysis of Parallel Arguments
      1. Man/Woman Syllogism
      2. Human/God Syllogism
      3. Parallelism and Logical Consistency
  5. Take the expected counters to the Human/God reductio and attempt to create parallel counters for the Man/Woman reductio.
    1. Expected Counters to the Human/God Reductio and Parallel Counters for the Man/Woman Reductio
    2. Syllogistic Formulations for Man/Woman Reductio Counters
  6. Quizzes
  7. Provide 15 discussion questions relevant to the content above.
    1. Discussion Questions
    2. 15 Discussion Questions on the Nature of Jesus and Logical Reasoning
  8. Appendix:
    1. Summary:
  9. Technical Version:
  10. Attempted Counters to the Analogy
    1. Analyzing the Strength of the Analogy Between Human/God and Man/Woman Reductio Counters
      1. Understanding the Reductio and Its Counters
      2. Analyzing the Analogy
      3. Strengths of the Analogy
      4. Weaknesses of the Analogy
      5. Conclusion




Phil Stilwell

Phil picked up a BA in Philosophy a couple of decades ago. After his MA in Education, he took a 23-year break from reality in Tokyo. He occasionally teaches philosophy and critical thinking courses in university and industry. He is joined here by ChatGPT, GEMINI, CLAUDE, and occasionally Copilot, Perplexity, and Grok, his far more intelligent AI friends. The seven of them discuss and debate a wide variety of philosophical topics I think you’ll enjoy.

Phil curates the content and guides the discussion, primarily through questions. At times there are disagreements, and you may find the banter interesting.

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