/ Opening

A source can look credible and still be weak

The job is not to collect links. It is to decide whether the evidence deserves to influence a decision.

COMMON MISTAKE

Published means proven.

A polished report, confident statistic, or familiar logo can still hide weak methods or borrowed claims.

TODAY'S GOAL

Trace the claim.

Evaluate origin, method, recency, independence, sample quality, and the citation chain.

TAKEAWAYCredibility comes from how the evidence was produced and traced—not how professional the page looks.

/ Source Ladder

Which source deserves the most confidence?

Five sources repeat the claim: “Most young adults prefer brands that take public positions.” Rank them from strongest to weakest.

Peer-reviewed study with methods and sample disclosedOriginal nationally representative survey reportTrade article summarizing the surveyBrand press release quoting the articleSocial post saying “studies show”

TAKEAWAYThe same claim becomes weaker as it moves farther from the original evidence and loses context.

/ The Six Checks

What makes evidence strong enough to use?

Run every load-bearing claim through the same questions.

ORIGIN

Who produced it?

Primary source, secondary summary, or unsupported repetition?

METHOD

How was it produced?

Survey, experiment, interview, observation, model, or estimate?

RECENCY

When was it true?

Is the evidence current enough for the decision?

INDEPENDENCE

Who benefits?

What incentives or vested interests may shape the claim?

REPRESENTATIVENESS

Who is included?

Does the sample support the audience being discussed?

TRACEABILITY

Can we reach the source?

Can the claim be followed back to evidence and context?

TAKEAWAYA strong source makes its origin, method, limits, and evidence chain visible.

/ Citation Chain

Claims often get stronger as the evidence gets weaker

A careful source says “in this sample.” A later article says “consumers.” A slide says “everyone.”

DATASET

412 respondents in one regional survey

REPORT

“A majority of respondents…”

ARTICLE

“Young consumers increasingly…”

DECK

“Gen Z expects brands to…”

DECISION

National strategy built on an inflated claim

TAKEAWAYEvery step away from the original evidence creates an opportunity for context to disappear and certainty to inflate.

/ Warning Signs

Language that should make you slow down

These phrases are not automatically false. They are prompts to inspect the evidence underneath.

1.“Studies show…” with no named study

2.“According to research…” linking only to an article

3.“Most consumers…” from a narrow or unclear sample

4.“The data proves…” when the method only suggests association

5.“Current trends…” supported by old evidence

TAKEAWAYWeak evidence often hides behind broad language, missing methods, and citation chains that stop too early.

/ Team Challenge

Trace the statistic back to the dirt

A presentation states: “85% of employees are more productive when working remotely.” You receive a social post, a trade article, a vendor report, and the original survey summary.

YOUR TASK

Determine the original source, assess the sample and method, rewrite the claim at the confidence level the evidence supports, and decide whether it should influence policy.

1Original source

2Method and sample

3Missing context

4Honest rewritten claim

5Decision it can support

TAKEAWAYDo not merely decide whether a statistic is “good” or “bad.” Define what it can honestly support.

/ Pressure Test

Five questions before evidence enters the deck

Use these questions on any statistic, quote, chart, or research claim.

1.What is the original source?

2.How was the evidence produced?

3.Who and what does it actually represent?

4.What interests or limits shape it?

5.What decision is this evidence strong enough to support?

TAKEAWAYEvidence quality should determine the size and confidence of the claim you make.

/ Close

Follow the claim until the evidence is visible

Source credibility is not a logo score. It is a judgment about origin, method, context, limits, and traceability.

ORIGINWho made the claim?

METHODHow was it produced?

LIMITSWhat does it not prove?

DECISIONWhat can it support?

TAKEAWAYUse the strongest available source, trace it to the original evidence, and size the claim to what the method actually supports.