An Introduction to Fact-Checking for Everyone, Practiced by Healthcare Professionals

When working in a medical setting, I am often consulted by patients who say, 'I saw this health method on the internet.' Honestly, there is quite a bit of information out there with questionable scientific evidence. However, this is not limited to medical information. Statements by politicians, posts spread on social media, chain messages... our surroundings are overflowing with information of uncertain authenticity. I have also seen many people become anxious after being swayed by information. That is precisely why today, I would like to share concrete methods for fact-checking that even non-experts can practice. With just a little effort, you can lead a life that is not easily misled by misinformation.

Why fact-checking is necessary now

We live in an era where information overflows the moment you open your smartphone. While convenient, it also makes it easy for information that is contrary to facts or misleading content to spread.

In the medical field, there are actual cases where people believe baseless information such as 'eating X will cure cancer' and delay receiving appropriate treatment. In the political sphere, out-of-context statements can create misunderstandings, and on social media, old disaster photos are sometimes spread as if they were from a different incident.

What is needed to avoid being swayed by information is 'fact-checking.' It may sound difficult, but once you learn the basic steps, anyone can practice it.

[Field 1] Fact-checking political statements

Statements by politicians and election pledges have a direct impact on our lives. That is precisely why we want to carefully verify their authenticity.

1. Confirm the source and accurate content of the statement

First, the absolute basic. Did that person really say that? Are you judging based only on a clipped quote on social media?

Go to primary sources such as the speaker's official website, meeting minutes, or press conference transcripts. Just checking the context before and after can completely change the impression.

2. Consult official records and primary documents

For statements by politicians, check the National Diet meeting minutes, summaries of local government proceedings, or government press releases. If the claim is 'passed Bill X,' it should be verifiable in the actual Diet records.

If you cannot find official documents, you need to doubt the reliability of the information itself.

3. Verify the context of the statement and supporting data

Statements containing statistics, such as 'the unemployment rate is at an all-time low,' should be cross-referenced with actual government statistical data. Make sure to confirm whether the numbers are accurate, if there are any misinterpretations, or if old information is being used.

4. Cross-check with information from other media and experts

Compare how multiple news organizations are reporting the same statement. If the content differs depending on the report, be careful. Expert opinions are also helpful.

If it is about the economy, check comments from economists; if it is about science policy, check comments from experts to make a multifaceted judgment.

5. Utilize specialized fact-checking sites

Overseas, FactCheck.org, PolitiFact, and Snopes are famous. In Japan as well, media participating in the FactCheck Initiative (FIJ), as well as the Japan Fact-check Center (JFC) and AFP Fact Check publish verification articles.

If you come across a statement that concerns you, try searching for the person's name or keywords within the site. Someone may have already verified it.

6. Distinguish between facts and opinions

This is important. "The XX Act is a bad law" is an opinion, so it is not subject to fact-checking. However, "The XX Act will double taxes" can be verified as a fact.

Political discourse often mixes facts and opinions, so let's focus on the "facts" that can be verified.

[Field 2] Fact-checking medical information

As a healthcare professional, this is a part I particularly want to emphasize. This is because misinformation about health directly affects people's lives and well-being.

1. Verify the source and purpose of the information

Who is disseminating the information? Is it a doctor or a public health agency, an anonymous social media user, or a supplement sales site?

In particular, if a seller of supplements or health foods is talking about a "miracle health method," suspect that there may be a commercial motive. Also, be wary of hearsay formats like "I heard it from a doctor I know."

2. Check for scientific basis and evidence

Claims such as "Eating XX cures cancer" should have medical papers or clinical trial results. Try searching on Google for "XX efficacy evidence" or "XX effect research".

Guidelines and Q&As from the Ministry of Health, Labour and Welfare and the WHO (World Health Organization) are also helpful. It is also a point whether multiple research results are consistent.

However, there is a point to note. Phrases like "scientifically proven" or "endorsed by experts" are sometimes abused for advertising purposes. Check for specific evidence.

3. Cross-reference with public institutions and reliable medical information

Compare with views published by the Ministry of Health, Labour and Welfare, national research institutes, the WHO, and the CDC (Centers for Disease Control and Prevention).

For example, if you are concerned about vaccine side effects, check the Q&A page of the Ministry of Health, Labour and Welfare or the WHO's "List of Misinformation about Vaccines". You can look up the incidence rate and whether there is a causal relationship.

Health "common sense" that public institutions do not mention at all should be treated with suspicion.

4. Use fact-checking sites and expert commentary

Snopes has a category for medical hoaxes. You may find articles that verify famous hoaxes, such as "vaccines cause infertility," from a medical perspective.

There are also sites in Japan where medical experts provide commentary, as well as blogs by medical journalists. Try searching for "XX truth or falsehood" or "XX hoax doctor commentary".

Health Feedback, and other specialized sites where scientists from around the world evaluate the credibility of news can also be utilized.

5. Cross-check with multiple reliable sources

This is a golden rule. Do not judge based on just one site or article.

If many doctors and studies conclude that something is "ineffective," but only a few sites claim it has "dramatic effects," you should be skeptical of that minority information.

Medicine is updated daily. Since the content of an article from five years ago may differ from the latest research, be mindful of the freshness of the information.

6. Do not take things at face value; take a breath before sharing

Medical and health information is something you often want to tell others about. However, unless you are certain, please do not share it lightly.

Before retweeting a health tip you saw on social media, pause and think, "Could this be wrong?" This habit is important.

Spreading incorrect medical information can potentially harm people. Consider information with unclear authenticity as "possibly a hoax" and be cautious. It also takes courage not to share until you have obtained reliable confirmation.

【Field 3】Fact-checking information spread on social media

On social media platforms like Twitter (now X), Facebook, and LINE, posts with images and chain messages are spread daily. Let's master the verification methods for these.

1. Observe the sender and the credibility of the post

Is the account reliable? Is it an organization with an official mark, an anonymous individual, or a new account with very few followers?

Chain messages or posts that say "I heard from a friend..." are typically suspicious. The recency of the account creation date and an unnaturally biased posting history are also clues.

2. Verify the authenticity of images and videos

Photos and videos in social media posts may have been repurposed from other contexts or manipulated.

Use reverse image search. You can use Google Lens or TinEye to investigate where that image has been used in the past.

If you see a photo claiming "Major accident at XX," use image search to check if it appears in articles about a completely different incident from years ago. For videos, there are methods to extract key frames using tools like InVID and then perform an image search on those frames.

Recently, AI-generated fake images and videos (deepfakes) are also circulating. Look closely to see if there are any unnatural points, such as distortions in fingers or the background.

3. Search for the post content using keywords

Web searching is the absolute foundation of fact-checking. Extract characteristic phrases from the post and try searching for them on Google.

If it is social media information claiming that "a high-ranking government official said such-and-such," search for "such-and-such statement high-ranking government official truth." Look to see if major media outlets have reported it, or if there are any articles debunking it.

If it were a major incident or a serious issue, there is no way major media outlets would not report it. The fact that no one is reporting it can be a basis for judging it as suspicious.

Conversely, if it has already been flagged as misinformation, you may find "hoax alert" notices from local governments, police, or newspapers in the search results.

4. Refer to fact-checking sites and hoax information databases

Try searching sites like Snopes (famous for verifying urban legends and internet hoaxes), Reuters Fact Check, or the fact-checking pages of AFP.

With Google's "Fact Check Explorer", you can perform a cross-search of related fact-checking articles by entering keywords.

Even for rumors in Japanese, if you search using "English keywords + fact check," you may hit upon overseas fact-checking articles.

In cases of stories that have been circulating repeatedly for a long time via chain mail, or fake news originating overseas that has been translated into Japanese, there is a high probability that a third party has already verified it.

5. Check for unnatural content and typical characteristics of hoaxes

Typical hoax posts have common points.

• "Experts say such-and-such" (vague evidence)

• "Spread this right now!" (inciting tone)

• "There are people who want to hide this" (conspiracy theory-like)

• Many typos and omissions, unnatural Japanese

If these characteristics are present, be careful.

Also, people tend to believe content that appeals strongly to emotions. If you feel, "This is terrible! I can't forgive this!," make it a habit to take a step back and verify whether it is a fact.

6. Consider the background and intent behind the spread of that information

Try to calmly think,"Why was this information created?".

If it is a political rumor, it might be to disparage a specific person; if it is a strange chain story, the goal might be mischief or to gather attention. You cannot determine the truth just by guessing the intent, but you can develop a mindset of not taking things at face value.

However, be careful not to fall into conspiracy theories. Considering the purpose is part of critical thinking, and the presence or absence of facts is judged by evidence.

7. Do not spread misinformation; provide counter-evidence

If you feel that information you saw on social media is suspicious, do not share it immediately. Especially with chain messages, even if they say "send this to everyone," have the courage to stop it there.

If you determine that it is misinformation, consider correcting it by providing accurate information if possible. If a hoax is sent in a group chat, don't just ignore it; introducing links to reliable sources or fact-checking articles will make it harder for those around you to be deceived.

When pointing it out, do not get emotional; calmly convey that "there is also this information." It is important to share the facts rather than blaming the other person.

Try to make fact-checking a daily habit

After reading this far, some of you might think, "This seems like a hassle..."

But you don't have to do everything perfectly. First, try to make at least the following three things a habit.

1. Do not believe immediately; check multiple sources

Do not judge based on just one post or article. Always look for other reliable information. Especially for serious content, make sure to verify it.

2. Check images and videos with search tools

Information that is visually impactful is often used for fakes. Use image and video searches, which take only a few seconds, to check if they have been reused or manipulated.

3. Distinguish between "facts" and "opinions"

Identify which parts of statements or articles are verifiable facts. It is important to get into the habit of grasping the facts without being swayed by opinions or speculation.

In conclusion

While interacting with patients, I have seen many people whose anxiety has been amplified by misinformation. Consultations like "I'm worried because it was written like this on the internet..." are very common.

Fact-checking takes a little extra effort, but in return, you will not be swayed by hoaxes and will be able to make decisions based on accurate information.

Many organizations, such as Snopes, FactCheck.org, media participating in the FactCheck Initiative, and the Japan Fact-check Center, publish verification results for us. Use them wisely, and try checking information you are curious about yourself using the steps I introduced today.

If you navigate the information society with a stance of "never taking things at face value," you should be able to make calm judgments without being misled by fake news.

Your information literacy will lead to protecting not only yourself but also the important people around you.

(Used ChatGPT-5.2 thinking Deep Research and Claude Sonnet)

#FactChecking #InformationLiteracy #MedicalInformation #SNSMisinformationCountermeasures #FakeNewsCountermeasures