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Internet Basics: Browsers, Search, Downloads, and Online Safety

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Evaluating Trustworthy Sources and Spotting Misleading Content

Capítulo 3

Estimated reading time: 9 minutes

+ Exercise

What “Trustworthy” Means Online

A trustworthy source is one that is transparent about who created it, why it exists, and where its information comes from. Trustworthiness is not about agreeing with the message; it is about whether the content can be checked, supported by evidence, and updated when facts change.

This chapter gives you a repeatable checklist you can use on any website, post, or article—without needing advanced technical skills.

A Repeatable Credibility Checklist (Use This Every Time)

Step 1: Identify the purpose and the author

Start by answering: “Who is behind this, and what do they want me to do or believe?”

  • Find an About page: Look for “About,” “About us,” “Our mission,” or “Editorial policy.” A trustworthy site usually explains its purpose and who runs it.
  • Look for real contact information: A physical address, phone number, support email, or a contact form is a good sign. No contact info (or only a generic form) can be a warning sign.
  • Check author details: Is an author named? Do they list credentials or relevant experience? Are they reachable (e.g., professional profile)?
  • Watch for unclear ownership: If you cannot tell whether it’s a news site, a personal blog, a company selling something, or a political advocacy page, treat it cautiously.
What you seeWhat it often meansWhat to do
Clear About page + named author + contact infoHigher transparencyContinue to next steps
No author, no About page, no contact infoLow accountabilityCross-check heavily or avoid
“Sponsored,” “Partner content,” heavy product linksMarketing purposeAssume bias; verify claims elsewhere

Step 2: Check the date and updates

Even accurate information can become outdated. Always look for when it was published and whether it has been updated.

  • Find the publish date: Often near the headline or at the top/bottom of the article.
  • Look for “Updated on”: Some pages show updates and what changed.
  • Check whether the topic needs freshness: Health guidance, prices, laws, and technology change quickly. A page from years ago may be misleading today.
  • Be careful with missing dates: If there’s no date, you may not know if the information is current.

Step 3: Look for evidence and citations

Trustworthy content shows where its facts come from. Opinions are fine, but factual claims should be supported.

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  • Look for sources: Links to official documents, datasets, research, court records, reputable organizations, or direct quotes with context.
  • Check if sources match the claim: A link can be present but irrelevant. Open it and confirm it actually supports the statement.
  • Prefer primary sources when possible: Examples include government reports, official statements, scientific papers, or original data.
  • Beware of “circular reporting”: Many sites may repeat the same claim while all referencing each other, without an original source.

Quick test: If a page makes a strong claim (health, money, safety, legal) and provides no sources, treat it as unverified.

Step 4: Compare with at least one independent source

Before you accept or share a claim, confirm it using at least one other source that is not connected to the first one.

  • Choose an independent source: Not a site that looks like it belongs to the same network, brand, or author.
  • Compare the core facts: Names, dates, numbers, and what happened.
  • If sources disagree: Prefer the one with clearer evidence, better transparency, and more direct documentation.

Practical rule: If you cannot confirm a major claim elsewhere, label it “unconfirmed” and avoid sharing it as fact.

Step 5: Recognize emotionally manipulative headlines

Misleading content often tries to trigger strong emotions (anger, fear, outrage, excitement) to get clicks and shares.

  • Watch for urgency: “Act now,” “Before it’s deleted,” “Share immediately.”
  • Watch for extreme language: “Shocking,” “destroyed,” “exposed,” “the truth they don’t want you to know.”
  • Watch for “us vs. them” framing: Content that tries to make you feel part of a team and distrust everyone else.
  • Pause before reacting: If a headline makes you instantly angry or scared, that’s a signal to slow down and verify.

Common Warning Signs (Red Flags)

Look-alike domains (copycat website addresses)

Some misleading sites use names that look similar to well-known organizations.

  • Small spelling changes: Example patterns: examp1e.com (number 1 instead of letter l), examplle.com (double letters), example-news.com pretending to be example.com.
  • Extra words added: brandname-support.com or brandname-verification.com may not be official.
  • Different domain endings: A familiar brand with an unusual ending can be suspicious (for example, a site pretending to be a local institution but using an unrelated domain ending).

What to do: Read the website address carefully. If it seems “almost right,” treat it as suspicious and verify through an official channel.

Sensational claims that skip the “how”

Misleading pages often make big promises without explaining the method or providing evidence.

  • “This one trick cures…”
  • “Guaranteed results in 24 hours…”
  • “Scientists hate this…”

What to do: Demand specifics. Who are the experts? What study? What data? If the page avoids details, don’t trust it.

Missing sources or vague references

Phrases like “experts say” or “studies show” are not sources unless the page identifies which experts and which studies.

  • Vague attribution: “A leading university found…” (Which one?)
  • No links or documents: Claims with nothing to check.
  • Broken links: Sources that lead nowhere can be a sign of poor quality or deception.

Misleading images (out of context or edited)

Images can be used to create a false impression even if the text is careful.

  • Out-of-context photos: A photo from a different time or place presented as “today.”
  • Before/after images: Different lighting, angles, or editing can fake results.
  • Charts without labels: Missing axes, missing dates, or unclear units can mislead.

What to do: Treat images as “illustrations” unless the page explains where they came from and when they were taken. If an image is the main “proof,” be skeptical.

Mini-Checklist You Can Copy

1) Who made this? (About page, author, contact info)  
2) Why does it exist? (inform, sell, persuade, entertain)  
3) When was it published/updated?  
4) What evidence is provided? (citations, documents, data)  
5) Can I confirm it with an independent source?  
6) Is the headline trying to trigger fear/anger/urgency?  
7) Any red flags? (look-alike domain, sensational claims, missing sources, misleading images)

Practice Scenarios (Decide: Trust, Cross-check, or Avoid)

Read each scenario like a real webpage. Decide what you would do, then compare with the explanation.

Scenario 1: “City Health Alert” page

What you see: The page headline says: “URGENT: New virus found in local water supply—share now!” The site address is cityhealth-alerts.com. There is no author name. There is a “Contact” link that only opens a form with no address or phone number. The page shows a dramatic photo of a hospital hallway. It says “officials confirm,” but does not name any department or link to a statement. The page asks you to “download the full report” from a button.

  • Your choice: Avoid
  • Why: Multiple red flags: emotionally urgent headline, unclear organization, no author, weak contact info, no evidence, and a push to download something (possible malware risk). The domain looks like it is trying to sound official but isn’t clearly a government or known public health organization.

Scenario 2: Product review blog

What you see: A blog post titled “Best Budget Laptops 2026.” It has a named author and an About page describing it as an affiliate review site (it earns money from links). Each laptop has pros/cons and links to seller pages. Some claims are specific (battery life numbers), but there are no links to testing methods. The post shows “Updated: Jan 2026.”

  • Your choice: Cross-check
  • Why: The site is transparent about its purpose (earning affiliate income), which is good, but that also means potential bias. The claims should be verified with at least one independent review source, especially for performance and reliability.

Scenario 3: Community forum post about a new law

What you see: A forum user posts: “New law starts next week—everyone must pay a $300 fee or lose their license.” No links. Other users argue in the comments. One person says “I heard it from a friend.”

  • Your choice: Cross-check (do not treat as fact)
  • Why: Forums can be useful for discussion, but this is a serious claim with no evidence. You should verify using an official source (government agency page or official announcement) and at least one reputable news outlet that cites documents.

Scenario 4: A news article with sources

What you see: An article about a local election change. It lists the reporter’s name, includes a short bio, and provides a newsroom contact email. It links to the official election office announcement and includes quotes from two named officials. It shows “Published” and “Updated” dates and explains what changed in the update.

  • Your choice: Trust (with normal caution)
  • Why: High transparency and strong evidence: named author, contact info, primary source links, and clear update history. You can still cross-check if the claim is important to you, but it meets the checklist well.

Scenario 5: A “miracle health” article with testimonials

What you see: A page titled “Doctors stunned by this natural cure.” It includes many personal stories and before/after photos. It says “clinically proven,” but the only “source” is a link to another blog post on the same site. The page has many ads and a countdown timer for a discount.

  • Your choice: Avoid
  • Why: Classic manipulation and missing evidence: sensational headline, testimonials instead of verifiable studies, circular sourcing, and pressure tactics (countdown timer). Health claims require high-quality evidence; this page does not provide it.

Scenario 6: A social post with a dramatic image

What you see: A post shows a photo of a damaged bridge and claims: “This happened today in our town because of corruption.” The post has no date, no location details, and no link to any report. Comments are angry and encouraging people to share.

  • Your choice: Cross-check (and do not share yet)
  • Why: The image may be real but out of context. The claim is specific and emotional, but provides no evidence. Look for independent confirmation from local authorities or reputable local news that includes verifiable details (time, place, official statements).

Now answer the exercise about the content:

A webpage makes a serious claim but provides no sources. What is the best next step before accepting or sharing it?

You are right! Congratulations, now go to the next page

You missed! Try again.

Strong claims without citations should be treated as unverified. Confirm the core facts with at least one independent source that provides clear evidence before sharing.

Next chapter

Understanding Links, URLs, and Website Identity

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