Original Theories Volume XXXI · science index
83 retained entries from the original 129. Original entry numbers are preserved. These are working hypotheses, not findings or proofs.
Averaging removes noise
- Theory 60 · Averaging Doesn't Cancel Bias
Averaging reduces random error but leaves systematic error untouched, so precision improves while accuracy stalls. - Theory 58 · Averaging Creates Artefacts
Averaging over heterogeneous units can create patterns that exist in no unit, including spurious trends and thresholds. - Theory 59 · Means Hide Tails
The mean of a heavy-tailed distribution is dominated by rare events, so averages misrepresent typical experience entirely.
Extinction is gradual
- Theory 19 · Background Is Punctuated Too
Even background extinction is punctuated by stochastic catastrophes rather than proceeding at a constant rate. - Theory 20 · Loss Lags Cause
Extinction lags its cause by decades, so current diversity reflects past habitat rather than present. - Theory 21 · Range Collapses Before Numbers
A species' range contracts before its abundance falls, so range is the earlier warning.
Selection optimises
- Theory 05 · Bet-Hedging Is Locally Suboptimal
Bet-hedging strategies are suboptimal in the arithmetic mean and optimal in the geometric mean, so which is 'optimal' depends on the averaging. - Theory 04 · Optimisation Is Local
Selection optimises fitness at the level it acts, which can systematically reduce function at higher levels. - Theory 06 · Means Optimise, Variances Don't
Selection optimises the mean of a trait while leaving its variance to drift and mutation, so populations can be well adapted and highly fragile.
Bigger animals are slower
- Theory 01 · Strike Speed Peaks Mid-Size
Strike speed peaks at intermediate body size, because acceleration falls with mass while reach rises, and the product is maximised between. - Theory 03 · Crossover Sets Escape Success
Escape success against a predator is set by the ratio of the prey's acceleration to the predator's, which crosses over at a characteristic size ratio. - Theory 02 · Wind Reverses the Size Ranking
In headwinds, larger birds achieve higher ground speeds than smaller ones at the same airspeed, because wing loading changes the optimum.
Correlation implies causation
- Theory 63 · Sometimes It's Trend
Two series that both trend will correlate strongly regardless of any relationship. - Theory 62 · Sometimes It's Backwards
Some associations run in the opposite direction to the assumed one, because early symptoms change exposure. - Theory 61 · Sometimes It's a Collider
Correlation can arise from conditioning on a common effect, so the association exists only in the selected sample.
Cold slows everything
- Theory 54 · Cold Stores Carbon
Cold slows decomposition more than production, so cold systems accumulate carbon despite slow growth. - Theory 53 · Cold Embrittles
Cooling slows diffusion but concentrates stress, so failure can occur sooner at lower temperature. - Theory 52 · Cold Can Accelerate
Some reactions accelerate on cooling when the mechanism switches to a lower-barrier pathway.
Complexity requires central control
- Theory 55 · Complexity Self-Organises
Complex structure can arise from local rules without central coordination, and does so in systems as different as morphogenesis and markets. - Theory 56 · Control Without Models
Effective control can be achieved without a model of the system, using feedback alone, when the delay is short relative to the dynamics. - Theory 57 · Decentralised Systems Adapt Faster
Decentralised systems adapt faster to heterogeneous conditions because local information is used locally.
Larger reserves protect more species
- Theory 23 · Connection Beats Size
For metapopulations, connectivity among small patches can support more species than one large isolated patch of equal total area. - Theory 24 · The Matrix Decides
Reserve effectiveness depends more on the surrounding matrix than on reserve size, because the matrix sets dispersal and edge pressure. - Theory 22 · Shape Beats Area
At equal area, a compact reserve protects more interior species than an elongated one, because edge penetration is fixed while perimeter scales.
Populations are well mixed
- Theory 07 · Clustering Sets the Threshold
Epidemic thresholds depend on contact clustering, so the same mean contact rate produces outbreaks or none depending on its distribution. - Theory 08 · Retention Breaks Assessment
Stock assessments that assume mixing overestimate recovery when larvae are retained near spawning grounds. - Theory 09 · Dispersal Is Fat-Tailed
Plant gene flow is leptokurtic, so isolation by distance fails at short range while long-distance events dominate at large range.
More data means better decisions
- Theory 10 · Confidence Outruns Accuracy
Adding data raises confidence faster than accuracy, so decision quality can fall while certainty rises. - Theory 12 · Real-Time Data Destabilises
Faster data increases reactivity, which amplifies fluctuations rather than damping them. - Theory 11 · Variables Outrun Signal
Adding variables increases overfitting faster than explanatory power once the ratio of variables to observations exceeds a threshold.
Diversification reduces risk
- Theory 96 · Diversification Adds Links
Diversifying suppliers adds links that each carry their own failure probability, so resilience improves only if failures are uncorrelated.
Early detection saves money
- Theory 108 · Detection Has Costs
False positives generate investigation, anxiety and complications that offset part of the benefit. - Theory 106 · Detection Finds Harmless Cases
Early detection finds lesions that would never have caused harm, so treatment costs rise while mortality falls little. - Theory 107 · Lead Time Inflates Survival
Survival improves with earlier diagnosis even when death is unchanged, so survival is not evidence of benefit.
Efficiency saves resources
- Theory 26 · Efficiency Removes Buffers
Efficiency improvements remove slack, which is what absorbs variability, so measured savings are partly transferred risk.
Systems return to equilibrium
- Theory 125 · Multiple Basins
Systems with multiple stable states do not return to the one they left, but to whichever basin the perturbation entered. - Theory 126 · Some Never Settle
Open systems driven far from equilibrium can sustain oscillations indefinitely, with no equilibrium to return to. - Theory 124 · Equilibria Move
The equilibrium itself changes as slow variables drift, so return is to a moving target.
Feedback loops stabilise
- Theory 46 · Delay Destabilises
A negative feedback loop destabilises when its delay exceeds a fraction of the oscillation period, turning damping into amplification. - Theory 47 · Gain Produces Overshoot
High feedback gain produces overshoot and oscillation even without delay, because the response exceeds the disturbance. - Theory 48 · Proxy Feedback Drifts
Feedback on a proxy rather than the target produces stable readings while the target degrades.
Forests are carbon sinks
- Theory 81 · Albedo Offsets Carbon
In high latitudes, the albedo change from forest expansion offsets much of the carbon benefit, and can reverse the sign. - Theory 79 · Sinks Saturate
Forest carbon uptake saturates as nutrient limitation and age reduce the response to higher carbon dioxide. - Theory 80 · Forests Can Be Sources
Disturbance and warming can turn a forest from sink to source while it remains visibly intact.
Memory is storage
- Theory 17 · Forgetting Is a Feature
Forgetting is adaptive because it removes outdated information that would otherwise misdirect decisions. - Theory 16 · Retrieval Rewrites
Retrieval is reconstructive, so each recall alters the trace it retrieves. - Theory 18 · Accuracy Trades With Speed
Memory accuracy trades against retrieval speed, so fast recall is necessarily less precise.
Groundwater is a buffer
- Theory 88 · Buffers Deplete
Groundwater buffers drought only until storage falls below the level at which abstraction becomes uneconomic. - Theory 90 · Contamination Persists
Contamination persists far longer than the abstraction that caused it, because residence times are measured in decades. - Theory 89 · Pumping Lowers Land
Aquifer compaction from pumping causes permanent land subsidence that reduces future storage.
Adaptation is gradual
- Theory 36 · Hybrids Adapt Instantly
Hybridisation can produce novel adaptive combinations in one generation, faster than either parental lineage could. - Theory 35 · Plasticity Comes First
Phenotypic plasticity precedes genetic adaptation, because it exposes variation to selection before alleles fix. - Theory 34 · Standing Variation Adapts Fast
Adaptation from standing variation can occur in a few generations, far faster than waiting for new mutations.
Species are units
- Theory 32 · Boundaries Are Arbitrary
Hybrid zones make species boundaries a matter of convention, since gene flow continues across the designated line. - Theory 33 · Microbes Have No Species
Microbial species concepts fail because horizontal gene transfer makes genealogy a network rather than a tree. - Theory 31 · Variation Within Exceeds Between
For many functional traits, intraspecific variation exceeds interspecific variation, so species-level means mislead.
Measurement improves management
- Theory 104 · Resolution Sets Error
Managing to an indicator at coarser resolution than the process produces errors proportional to the resolution ratio.
Networks grow more robust with size
- Theory 50 · Coupling Spreads Failure
Coupling networks together improves efficiency and creates failure paths that neither network had. - Theory 51 · Redistribution Overloads
Failure spreads because load redistributes faster than capacity can adjust, not because the initial fault is large. - Theory 49 · Size Concentrates Risk
Larger networks are more robust to random failure and more fragile to targeted failure, so size trades one for the other.
Oceans are infinite
- Theory 83 · Buffering Decreases
The ocean's buffering capacity falls as it absorbs carbon, so each additional unit of uptake costs more in pH. - Theory 82 · Dilution Is Slow
Ocean dilution is slow relative to emission, so concentrations accumulate in surface waters for centuries. - Theory 84 · Catches Peak and Fall
Catch per unit effort declines before stock collapse, so effort-based indicators lag the resource.
The past predicts the future
- Theory 127 · The Past Is Non-Stationary
Statistical relationships estimated over one period often fail out of sample because the underlying distribution shifts. - Theory 128 · Rare Events Aren't in the Record
The largest events are usually absent from the historical record, so past maxima underestimate future extremes. - Theory 129 · Selection Destroys Prediction
Models selected for past performance overfit, so the best historical model is often the worst forecaster.
Prevention is cheaper than cure
- Theory 109 · Prevention Is Diffuse
Prevention benefits are diffuse and delayed while costs are concentrated and immediate, so it is underfunded regardless of its efficiency. - Theory 111 · Prevention Is Offset
Preventive measures can be offset by risk compensation, so net benefit is smaller than the efficacy suggests. - Theory 110 · Prevention Needs Targeting
Universal prevention is often less efficient than targeted prevention, because absolute risk reduction depends on baseline risk.
Randomised trials settle causality
- Theory 29 · Trials Can't See Equilibria
Trials measure partial-equilibrium effects, so general-equilibrium responses can reverse the sign when scaled. - Theory 28 · Trials Don't Transport
Randomised trials identify effects under the conditions of the trial, and effect sizes typically shrink when scaled or moved. - Theory 30 · Trials Exclude the Affected
Trial populations systematically exclude the patients most likely to be treated, so efficacy estimates apply to a minority.
Sleep is for rest
- Theory 78 · Sleep Clears Waste
Sleep increases clearance of metabolic waste from the brain, which is why its absence degrades function cumulatively. - Theory 77 · Sleep Edits Memory
Sleep consolidates and generalises memories rather than simply preserving them, which is why sleep can change what is remembered. - Theory 76 · Sleep Is Active
Sleep is metabolically active work — clearance, consolidation and calibration — not recovery from activity.
Soil is renewable
- Theory 87 · Biology Recovers Slowly
Soil biological communities recover more slowly than chemistry, so fertility can appear restored while function is not. - Theory 85 · Soil Forms Slower Than It Erodes
Soil formation rates are one to two orders of magnitude below typical erosion rates under agriculture, so loss is effectively permanent. - Theory 86 · Compaction Is Irreversible
Compaction destroys pore structure that reform slowly or not at all, so the loss is not recovered by rest.
Technology substitutes for resources
- Theory 120 · Substitution Creates Criticality
Substitution concentrates demand on a few elements with constrained supply, creating new criticality. - Theory 118 · Substitution Has Limits
Substitution can relieve scarcity of one resource only by increasing demand for another, so the constraint moves rather than disappears.
Time heals
- Theory 121 · Time Doesn't Restore
Systems do not return to prior states with time; they settle into new states that merely resemble the old. - Theory 122 · Damage Compounds
Slow damage compounds faster than slow recovery, so time worsens rather than heals. - Theory 123 · Time Changes the Memory
Time does not fade a memory uniformly; it reconstructs it repeatedly, so what persists is a summary shaped by retelling.
Index narrowed to the focused science collection. Biological and ecological population dynamics, genetics, physiology and engineering are retained. Source numbering remains historical; no remaining hypothesis has been promoted to a finding.