Are the organisms genealogically related?
Scientific question: Where are organisms genealogically connected?
One tree of life—or multiple ancestral lineages?Biological Origins Project · Framework v2.1
Rules before results.
This page is the methodological source of truth for the project. Framework v2.1 retains the three-layer architecture and adds Temporal Adequacy as a required dimension within Major Biological Transformation.
Future case assessments must use this version or document a new version before rescoring evidence.
Three distinct layers
Questions may interact without substituting for one another.
How did the specified biological changes occur?
Assess historical continuity, mechanism, functional intermediates, development, genetics, integration, and the time available.
Ancestry and mechanistic reconstruction are assessed independently.How might scientific findings relate to Scripture?
Keep biblical text, interpretation, theological model, and science–Scripture compatibility distinct.
Biblical compatibility ≠ scientific confirmation.Ancestry asks whether organisms are related. Transformation asks how the biological change occurred.
Strong ancestry evidence does not automatically establish a complete mechanistic reconstruction. Incomplete mechanistic reconstruction does not automatically refute ancestry.
Scientific uncertainty ≠ automatic evidence of divine intervention.
Scope
The question is narrower than “every meaning of common ancestry.”
The ancestry layer investigates whether all extant cellular life shares a common biological ancestry, or whether at least two primary cellular lineages originated independently. It does not test the origin of the first living system, the ancestry of viruses as a whole, every local relationship, or theological claims.
Model A
Universal common ancestry
All extant cellular organisms are connected through a shared biological genealogy.
Prevailing scientific conclusion with extensive existing support.Predicted observations
- Core inherited systems and homologous characters should support compatible genealogical relationships after known complications are modeled.
- Across a proposed boundary, independent datasets should usually preserve nested patterns rather than a repeated break.
- Horizontal transfer and symbiosis may create networks in parts of the history without eliminating all vertical genealogy.
Potentially inconsistent observation
A pre-specified division of extant cellular groups that repeatedly fits an explicit independent-origin model better across suitable, independent datasets after plausible confounders are tested.
Plausible confounders
Horizontal gene transfer, endosymbiosis, hybridization, incomplete lineage sorting, convergence, saturation, paralogy, contamination, alignment error and model misspecification.
Would increase supportCompatible nested structure across independently sampled, appropriately modeled genomic and non-genomic evidence.
Would decrease supportA robust, replicated, model-discriminating boundary that persists under sensitivity analyses and expanded sampling.
Model B
Independent-origins model
Two or more primary lineages originated independently, so no shared biological ancestry connects every extant cellular lineage.
An incomplete alternative until it specifies lineages, boundaries, origin process and distinguishing observations.Predicted observations
- At least one boundary must be named before evidence is scored.
- The same boundary should recur across pre-specified evidence classes rather than moving when continuity is found.
- An explicit independent-origin model should explain the observations better than shared ancestry, not merely point to missing data.
Potentially inconsistent observation
Pre-registered boundaries repeatedly dissolve as sampling improves while compatible genealogical patterns continue across them.
Plausible confounders
Poor sampling, rapid divergence, gene loss, convergence, horizontal transfer, long-branch attraction, dating uncertainty and using taxonomic ranks as if they were ancestry boundaries.
Would increase supportA pre-specified boundary that is independently replicated, survives confounder tests and produces superior predictive fit under an explicit alternative model.
Would decrease supportFailure to identify stable boundaries or distinctive predictions, especially when shared-ancestry patterns continue across proposed breaks.
UCA and LUCA
A proposition is not the same as an inferred ancestor.
Universal common ancestry (UCA)
The broader proposition that extant cellular life is connected through shared biological genealogy.
Last universal common ancestor (LUCA)
The last ancestral organism or population inferred within that connected history. LUCA was not necessarily the first life, one individual, or the only lineage alive at the time.
Network-like early evolution
Extensive horizontal gene transfer can make early history partly network-like. That observation complicates a simple tree but does not, by itself, demonstrate independent origins.
A recent LUCA reconstruction explicitly used horizontal-transfer-aware phylogenetic reconciliation. Its detailed portrait is an inference with model-dependent uncertainty, not a direct observation.
Operational boundary test
“Discontinuity” is not a verdict until the test is specified.
- Freeze the boundary.Name the two sets of organisms and the ancestry claim before evidence scoring.
- Freeze the datasets.Pre-specify inclusion criteria, evidence classes, search dates and the role of each dataset.
- Define both models.State the shared-ancestry model and a usable independent-origin alternative with parameters or qualitative predictions precise enough to fail.
- Set decision thresholds.Define fit statistics, robustness checks or qualitative rules before inspecting the case result. Thresholds may vary by case but cannot be invented afterward.
- Test confounders.Repeat analyses under credible alternatives for transfer, convergence, sampling, dating, alignment and model choice.
- Replicate the boundary.Require the proposed break to recur in suitable, partly independent evidence rather than one selected marker.
Major Biological Transformation method
Define the transformation before judging the pathway.
Every case must state the starting and ending biological states; specified anatomical, developmental, genetic, functional, and physiological changes; proposed pathway and mechanisms; the best independently supported chronological interval and uncertainty; justified generation time; predictions; alternatives; dependencies; and evidence that could falsify or downgrade the pathway.
- T1 · Historical continuity
- T2 · Structural and functional intermediates
- T3 · Development
- T4 · Genetics and genomics
- T5 · Mechanistic demonstration
- T6 · Population and evolutionary feasibility
- T7 · Experimental evolution and direct observation
- T8 · Integration and dependency
- T9 · Constraints and alternatives
- T10 · Temporal Adequacy
Directly demonstrated, strongly supported, partially demonstrated, plausible but untested, and unknown are not interchangeable levels of mechanistic support.
Open the public Major Changes frameworkT10 · Temporal Adequacy
Could the proposed pathway operate within the available time?
Temporal Adequacy evaluates the specified pathway against the best independently supported chronological interval relevant to the transition, including represented uncertainty.
Time provides opportunity for biological processes to act. Time is not itself a biological mechanism.
Required questions
- How much time was available?
- What must happen during that interval?
- What mechanisms are proposed?
- What rates are supported?
- Are functional intermediate states available?
- How sensitive is the conclusion to assumptions?
Six decision states
- Temporally well supportedThe specified pathway and defensible rates fit comfortably within the independently supported interval.
- Temporally plausible but weakly constrainedThe pathway can fit, but key parameter uncertainties prevent a strong conclusion.
- Temporally unresolvedEnough information exists to pose the temporal question, but the pathway or model itself is insufficiently specified.
- Temporal tensionAcross reasonable parameter ranges, important parts of the specified pathway appear difficult to accommodate.
- Specified pathway not temporally supportedThe currently specified pathway is not temporally supported within the independently constrained interval across defensible parameter ranges. This high-threshold state does not rule out every possible mechanism.
- Insufficient evidenceThe empirical evidence needed to conduct a meaningful temporal analysis is inadequate.
High evidentiary threshold
Temporal tension and a strong negative state require robust analysis.
Where relevant, the case must document the independently constrained interval and uncertainty; mechanism assumptions; defensible rate ranges; generation time; population parameters; dependencies among changes; intermediate-state requirements; plausible alternative pathways; parameter ranges; sensitivity analysis; and major uncertainties. Missing values are not invented.
Temporal safeguards
Difficulty with time challenges the specified pathway first.
- Having enough time does not demonstrate that the pathway occurred.
- Not having a complete temporal model does not establish separate ancestry.
- Temporal tension becomes ancestry evidence only when additional ancestry-specific evidence supports that inference.
- Temporal difficulty does not automatically imply the Multiple Ancestral Lineages Hypothesis (MALH) or direct creation.
Decision language
Four outcomes that must not be collapsed.
The pre-specified independent-origin model explains the defined evidence better after confounder tests.
The evidence or models cannot discriminate. This is not support for either origin model.
The predicted break is absent or shared ancestry fits better. This rejects that boundary, not every possible boundary.
Requires evidence across life. Rejecting one whale boundary cannot prove universal common ancestry by itself.
Framework history
Version 2.1
- Framework v2.1 · current migration
- Formally added Temporal Adequacy within Major Biological Transformation; defined required questions, decision states, age-neutral testing, and cross-layer safeguards. Existing whale ancestry scoring was not changed.
- Framework v2.0 · superseded
- Introduced the three distinct layers: Ancestry, Major Biological Transformation, and Biblical Interpretation.
- Framework v1.0 · 16 August 2026
- Initial frozen framework: clarified ancestry scope, separated UCA from LUCA, defined the alternative ancestry model, and established case decision states and operational requirements.
Future changes must receive a new version, date, rationale and list of affected case assessments.