A bibliography should lead back to the evidence
A useful bibliography identifies the exact work and explains which claim it supports. A long reference list cannot replace checking the relevant passage, dataset or method.
Follow a question across fields.
Sourced explanations, practical notes and open questions, arranged by subject and Ranganathan’s five facets.
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42 references shown. Tags are editorial descriptors; these are not official Colon call numbers.
A bigger dollar total does not always mean more output
Current-dollar GDP measures activity at current prices. Real GDP removes price changes to support comparisons of output over time.
A conference DOI answers an identity question
A DOI helps identify a conference object or paper. Establishing its review process requires the relevant venue, track and publication policy; metadata alone cannot describe how the work was evaluated.
A correction needs more than a newly saved page
Fix the error and explain the change. A publication date, an update timestamp and a correction notice serve different purposes.
A drowned shore needs a local sea-level history
Water depth above an old shoreline reflects both ocean change and land movement. A global sea-level curve alone cannot date or explain a submerged settlement.
A letter is an encounter, not a whole life
Letters can reveal what a person communicated to a particular recipient at a particular time. A biographer still has to distinguish those words from broader claims about motives, relationships or private belief.
A registered clinical trial is not a treatment result
A registration describes a study and its planned questions. Evidence about effects requires results, study design and interpretation; an identifier alone cannot establish that a treatment works.
A terrace is also a drainage decision
Terraces manage runoff as well as slope. Their outlets, soil conditions, maintenance and place in a wider conservation system matter as much as the visible steps.
A timestamp needs a version beside it
An access timestamp records when you fetched a resource. A version identifies which content you used. Keeping both makes a changing reference easier to audit.
A treaty signature is not always ratification
When signature is subject to ratification, it does not itself establish consent to be bound. Check the treaty's rules, the recorded action and entry into force.
A valid argument can begin with a false claim
Validity concerns whether the conclusion follows from the premises. Soundness additionally requires the premises to be true.
An encyclopedia can be the beginning of a good search
Use an encyclopedia to understand a topic and locate its debates. Cite its own analysis where appropriate, and follow underlying references when your question depends on a specific observation, document or result.
Choose a map for the question, not the familiar outline
Every flat world map distorts something. Select a projection for the property you need to compare, and record its scale and extent.
DNA in the water is a clue with a travel history
Environmental DNA can identify genetic material in a sample. Interpreting the location and abundance of the organisms requires evidence about transport, decay, sampling and detection error.
Desalination still has to account for the salt
Desalination separates water and salts into different streams. Fresh product water leaves a more concentrated residual stream, which remains part of the system's energy and disposal problem.
How an ear stone can reveal a fish's age
Otolith growth layers can support fish-age estimates, but the layers need species-specific interpretation and validation. Repeated agreement between readers measures consistency, not automatically truth.
How can lake mud remember a forest?
Pollen preserved in dated sediment layers can reveal changes in vegetation. Its interpretation becomes stronger when compared with charcoal, chronology and other environmental evidence.
If the numbers match, has the finding been confirmed?
Rerunning an analysis can establish computational reproducibility. Testing the same question with newly collected data asks a different question: whether the finding replicates.
Knowing the script does not identify the language
A script describes a writing system. Language identification requires additional evidence because many languages share scripts and some use more than one.
Membership means member of which body?
Membership in an international organization, membership in one of its organs and participation as an observer are distinct statuses. Name the body and date.
Seawater is more than table salt in water
Seawater contains a mixture of dissolved ions. Sodium and chloride dominate, but salinity describes their combined concentration with other dissolved salts, not just sodium chloride.
The ISBN identifies the publication, not your particular copy
Use an ISBN to distinguish a publication's edition and format. Add a separate local identifier when tracking an individual copy.
The cistern is only half the water system
A storage tank cannot collect more water than its catchment supplies. Rainfall timing, collection losses, demand and maintenance determine whether a cistern is useful.
The date on a newspaper is not always the event date
Record the issue date separately from the event date described in an article. A retrospective, reprinted report or later correction can otherwise be placed on the wrong timeline.
The salt damage you cannot judge from a clean surface
Salt deterioration depends on moisture, pore structure and the salts present. A clean-looking surface does not establish that a historic material is stable or that a cleaning treatment is suitable.
The two dates on a Sanborn map
An atlas first printed in one year and corrected later is not an unchanged snapshot of its original date. Inspect its correction record.
Two classrooms can hide a confound
If one teacher delivers the new programme and another teaches the comparison group, the programme and teacher may be impossible to disentangle.
What a study can say about contemplative experience
A report of experience, a measured change and an explanation of ultimate reality are different claims. Each requires its own evidence.
What a sunken volcano tells us about a vanished island
Volcanic islands can grow, erode and subside below sea level. Establishing former land is a geological question; establishing human settlement requires a separate archaeological record.
What the Diamond Sutra's date actually dates
The famous 868 date belongs to a surviving printed copy. It is not the date on which Buddhism, the scripture or printing began.
When a demographic category changes, the trend needs a footnote
A change in recorded population categories can reflect demographic change and changes in questions or coding. Inspect the measurement before interpreting the trend.
When two knowledge labels are not quite the same
Keep a concept's identity, its label and its relationship to another catalogue separate. Similar wording is insufficient evidence of equivalence.
Which Leaves of Grass are you reading?
Whitman's title stayed familiar while its contents changed. Cite the edition when comparing poems, wording, arrangement or pagination.
Why a busier queue can deliver more slowly
For a stable system, average work in progress equals throughput rate times average flow time. Starting more work does not by itself increase completion capacity.
Why a cleaned painting can look like a different picture
Changes to grime, discoloured varnish and earlier repairs can alter a painting's appearance without showing that its original pigments changed.
Why a familiar page can give a misleading sense of learning
In a classic prose-learning experiment, restudying helped an immediate test, while prior recall tests helped delayed retention. Confidence and later recall did not move together.
Why a newer book can crumble before an older one
Paper composition and storage can matter more than age alone. Fibre length, acids, lignin and the environment influence deterioration.
Why an average visit can describe almost nobody
A few extreme values can pull a mean far from the middle observation. Report the median, sample size and distribution alongside the mean when describing uneven visit durations.
Atlantis: the evidence, and the harbour we invented
Plato supplies a powerful story. Geology supplies constraints. Neither supplies evidence for our fictional Marrow Harbour.
Beringia was real; the Lantern Shoals compact is fiction
A submerged landscape can be documented without inventing a lost nation or replacing the histories of living peoples.
East of Polynesia: a small invented island, with real limits
Freshwater, reef geology and carrying capacity can shape an imagined Pacific society without inventing a lost continent.
Mauritia belongs to deep time; Glasswater belongs to fiction
Ancient continental crust, real Indian Ocean trade and an explicitly invented island league operate on very different timelines.