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What do you think is the single most influential factor in determining with whom you become friends and whom you form romantic relationships? You might be surprised to learn that the answer is simple: the people with whom you have the most contact. This most important factor is proximity. You are more likely to be friends with people you have regular contact with. For example, there are decades of research that shows that you are more likely to become friends with people who live in your dorm,...
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Related Experiment Video

Updated: Dec 14, 2025

RBDT: A Computerized Task System based in Transposition for the Continuous Analysis of Relational Behavior Dynamics in Humans
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Relational biology and Church's thesis.

A H Louie1

  • 186 Dagmar Avenue, Ottawa, ON, K1L 5T4, Canada.

Bio Systems
|July 17, 2020
PubMed
Summary

Church's Thesis, a hypothesis on computability, is challenged by relational biology. The existence of living systems suggests that not all natural processes are computable, implying the thesis is false in the physical world.

Area of Science:

  • Foundations of Mathematics
  • Theoretical Biology
  • Metamathematics
  • Relational Biology

Background:

  • Church's Thesis posits that effective calculability and computability are equivalent.
  • The material world is often considered 'effective,' implying all processes could be syntactic.
  • Relational biology introduces the concept that living systems require noncomputable models.

Purpose of the Study:

  • To examine Church's Thesis from the perspective of relational biology.
  • To determine if Church's Thesis holds true as a physical proposition.
  • To explore the implications of living systems for computability in nature.

Main Methods:

  • Review of the fundamental principles of relational biology.
Keywords:
Church's thesisClosure to efficient causationEffectivenessModelling relationNoncomputabilityRelational biology

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  • Metamathematical analysis of computability in the context of natural phenomena.
  • Logical deduction based on the properties of living systems within relational biology.
  • Main Results:

    • Living systems, as understood in relational biology, necessitate noncomputable models.
    • The existence of such systems directly contradicts the universal applicability of Church's Thesis to the physical world.
    • Material processes, if they encompass living systems, cannot be entirely expressed in purely syntactic terms.

    Conclusions:

    • Church's Thesis is false as a physical proposition.
    • The existence of life demonstrates inherent noncomputability in the natural world.
    • Relational biology provides a framework for understanding these limitations of computability.