What does this claim actually say, what supports it and how far can I reasonably use it?
Identify the exact claim and source, inspect the evidence and numerical context, compare independent accounts and record what remains uncertain. The strength of a conclusion should match the evidence examined.
Evidence checked October 17, 2026 (America/Denver; research received October 18 UTC). Version 1.0. Desk review; no hands-on testing.
What this guide helps you do
For everyday reading and learning about science, statistics and online information. The examples are educational and do not determine a particular scientific dispute or an individual medical, legal or financial decision.
Write the claim before evaluating it
Save the exact proposition in context, its creator, date, original location and intended audience. Identify whether it describes an observation, explains a cause, predicts an outcome or recommends an action. Ask what evidence would address that kind of claim. Keep an interpretation separate from the source statement. A familiar name, polished graph or repeated headline can help identify material but does not establish its evidentiary strength.
Ask how an idea meets evidence
Berkeley’s overview describes science as testing ideas against evidence from the natural world and revising understanding as evidence develops. For a particular result, locate the original work and its methods, scope and stated limitations. Distinguish what was observed from the explanation offered. Ask what would challenge the conclusion and whether other relevant evidence agrees. An introductory framework helps formulate questions; it does not adjudicate a specialized scientific dispute. Source: Berkeley Understanding Science 101.
Read the numerical context
Identify the unit, denominator, population and time period behind a number. Check whether a comparison uses the same basis and whether uncertainty or missing observations matter. A fictional example: 8 out of 20 is 40%, while 12 out of 20 is 60%. The difference is 20 percentage points and a 50% increase relative to the initial 40%. Those statements describe different measures; none by itself explains what caused the change.
Build the foundations needed for the question
If a result depends on unfamiliar statistics, find the relevant concept before relying on a headline. OpenStax’s introductory sequence covers sampling, descriptive statistics, probability and inference, with intermediate algebra assumed. Begin at a suitable level and obtain help when necessary. Knowing a formula’s name does not establish that the data or method fit a particular study. The fictional arithmetic above is our original example, not an exercise copied from the book. Source: OpenStax Introductory Statistics 2e.
Investigate who is behind an online source
Use independent pages to learn about an unfamiliar creator, organization and its relevant expertise or interests. DIG’s lateral-reading overview recommends leaving the original webpage to investigate its source elsewhere. Check whether apparently separate accounts repeat one original report, and return to the underlying evidence. Record disagreements and corrections. The public lesson description is accessible; its teacher and student files require an account and were not reviewed here. Source: Digital Inquiry Group lateral-reading lesson overview.
Make the conclusion proportionate and revisable
Write the evidence that supports the claim, what limits it and what remains unknown. Identify the source version used and a review trigger such as a correction, new data or a changed method. For a consequential personal decision, seek appropriate current expertise rather than treating a general literacy worksheet as individualized advice. Leave enough of the research trail for another reader to challenge the conclusion or update it responsibly.
A pathway to practice
- Identify the claim: Keep the original source, context and date.
- Examine the evidence: Check method, numbers, scope and uncertainty.
- Compare independent accounts: Investigate the source and disagreements.
- Record a limited conclusion: Keep the reasoning open to correction.
Resources and their limitations
Berkeley Understanding Science 101
Use it for: Develop questions about evidence, testing and revision of scientific ideas.
Access and cost: Public overview is free; linked material and specialist instruction have separate conditions.
How to use it: Read the overview, then follow the relevant topic with the original evidence for a particular claim.
Evaluation and limits: Overview rechecked; linked PDF and deeper chapters not reviewed. No scientific dispute, experiment, product, health decision or educational outcome assessed.
Alternatives: Original research, relevant expert review and the library’s claim/evidence guides.
Open Berkeley Understanding Science 101
OpenStax Introductory Statistics 2e
Use it for: Find a structured route from sampling and descriptive statistics to uncertainty and inference.
Access and cost: Publisher provides free web/PDF access and separate print formats; only public HTML was read. Equipment and instruction cost extra.
How to use it: Read the book description and preface; check intermediate-algebra prerequisites and choose relevant chapters with suitable support.
Evaluation and limits: Published December 13, 2023; web version visibly updated July 7, 2026. Only landing page and preface reviewed, not technical chapters or exercises. CC BY-NC-SA and separate AI/reuse notices retained; no book text, illustrations or exercises reproduced.
Alternatives: An appropriate introductory course, a tutor or a simpler arithmetic text before the statistics sequence.
Open OpenStax Introductory Statistics 2e
Digital Inquiry Group lateral-reading lesson overview
Use it for: Investigate an unfamiliar source through independent information about its creator.
Access and cost: Public description is readable; free lesson materials require a DIG account. No sign-in performed.
How to use it: Read the lesson description, then investigate the source’s creator through independent pages before returning to the claim.
Evaluation and limits: Only public lesson overview reviewed. Teacher/student files, account functions, videos and assessments not opened or tested. A strategy does not establish a verdict about any particular source.
Alternatives: The library’s primary-source and evidence guides; a librarian or suitable media-literacy course.
Open Digital Inquiry Group lateral-reading lesson overview
Checklist
- Identify the precise claim, creator, date and original source.
- Ask what evidence would support that kind of claim.
- Check methods, scope, limitations and competing evidence.
- Read units, denominators, time periods and uncertainty.
- Investigate unfamiliar sources through independent information.
- Record a bounded conclusion and a reason to revisit it.
Related guides
Scientific literacy (SG-D01-S02); Mathematics and practical calculation (SG-D01-S03); Finding primary sources (SG-D18-S02); Checking claims and comparing evidence (SG-D18-S03); Research notes and knowledge systems (SG-D18-S06); Systems of Trust (SG-D18-S07); Personal learning plans (SG-D19-S01); AI for learning and practical work (SG-D17-S05).
From the Whole Earth registry to current practice
Scientific American Offprints and Encyclopedias point readers to essays and reference collections, including a comparative reference-book table. Historical article judgments, ranking criteria, medical/scientific conclusions, prices and access arrangements are not current verified evidence.
Whole Earth Spring 1969 archive edition
Read the OpenStax statistics preface and learning sequence
Sources and review notes
No study, dataset, product, scientific dispute, account, assessment or learner outcome was tested. OpenStax review covered its description and preface only. The worked percentages use fictional counts and establish arithmetic alone; they imply no real-world effect or cause.
