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The official domain

The address of this site ends in odersa.org. Every service the association runs sits on a subdomain of odersa.org and nowhere else. If the address in your browser’s address bar does not end in odersa.org, this site is not ours.

Free, and no account

Everything is open straight away. No sign-up, no account, no password, no subscription, no advertising. Nothing is held back for those who pay, because there is nothing to pay for.

No data collected

This site does not follow you: no tracker, no tracking cookie, no measurement tool built into these pages, and nothing measured on your device. Our host counts requests in aggregate, as any server that answers does: a total, never a profile. You do not have to take our word for it: open your browser’s developer tools, go to the Network tab, and reload the page. You will see the full list of what the site asks for. Everything comes from odersa.org, nothing goes anywhere else.

Free to reuse

The content is published under the CC BY 4.0 licence. You may copy it, translate it, print it and pass it on, for your classes as much as for the people around you, on one condition only: credit ODERSA.

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The case library

Every training case, readable without the quiz: the situation, the question, then the unfoldable answer with its explanation. Perfect for preparing a workshop, or for quiet revision.

Prefer the interactive quiz

Health & miracle cures

30 cases in this category

Easy 10 · Medium 10 · Tough 10

Scams & easy money

30 cases in this category

Easy 10 · Medium 10 · Tough 10

Misused images & videos

30 cases in this category

Easy 10 · Medium 10 · Tough 10

Fake experts

30 cases in this category

Easy 10 · Medium 10 · Tough 10

Misleading numbers

30 cases in this category

Easy 10 · Medium 10 · Tough 10

Old content resurfacing

30 cases in this category

Easy 10 · Medium 10 · Tough 10

Fabricated content

30 cases in this category

Easy 10 · Medium 10 · Tough 10

Viral messages & chains

30 cases in this category

Easy 10 · Medium 10 · Tough 10

Trap headlines

30 cases in this category

Easy 10 · Medium 10 · Tough 10

“They're hiding everything”

30 cases in this category

Easy 10 · Medium 10 · Tough 10

Keyboard shortcuts

?Open this help
EscClose the panel or this help
1-3Pick an answer during the quiz
EnterNext case, once you've read the answer
TabMove from link to link: the whole site works by keyboard