# Global 100 Forum

> Global 100 Forum collects real questions and worked answers on AI detection, deepfakes and content authenticity.

Threads open with a short, self-contained answer, then the discussion. Posts marked Staff are written by the forum team and cite primary sources. Dates on every post are machine-readable. Each thread is also available as Markdown: replace the trailing slash of its URL with `.md`.

## [AI text detection](https://global100.org/forum/f/ai-text-detection/)
How AI text detectors score writing, the error rates independent tests report, where they fail on edited text, and how to read a result.

- [How accurate are AI detectors on short texts like a 150-word discussion post?](https://global100.org/forum/q/how-accurate-are-ai-detectors-on-short-texts-like-a-150-word/): I TA for a writing course, and weekly discussion posts are capped at about 150 words.
- [Does dictating an essay with speech-to-text and then cleaning it up look like AI to detectors?](https://global100.org/forum/q/does-dictating-an-essay-with-speech-to-text-and-then-cleaning-it-up/): My son broke his right wrist at the start of term and has been dictating his essays since.
- [I ran my own 2019 essays through a detector and half came back as AI. Is that normal?](https://global100.org/forum/q/i-ran-my-own-2019-essays-through-a-detector-and-half-came-back-as-ai/): I did a small experiment for a workshop I teach.
- [Do AI detectors flag text written with autocomplete, like Gmail Smart Compose or Copilot in Word?](https://global100.org/forum/q/do-ai-detectors-flag-text-written-with-autocomplete-like-gmail-smart/): I write marketing copy for a living.
- [Do AI detectors work on essays written in Spanish, German or Arabic, not English?](https://global100.org/forum/q/do-ai-detectors-work-on-essays-written-in-spanish-german-or-arabic-not/): I have a question about languages other than English, because I could not find a clear answer anywhere.
- [Do AI detectors work on code (GitHub Copilot, programming assignments)?](https://global100.org/forum/q/do-ai-detectors-work-on-code-github-copilot-programming-assignments/): I TA a writing course, but this term I also picked up grading for an introductory Python course and I have run into something I do not know how to think about.
- [Does watermarking AI-generated text actually work?](https://global100.org/forum/q/does-watermarking-ai-generated-text-actually-work/): It works when the model provider builds it in and the text is not heavily edited, which makes it far more reliable than guessing from style.
- [Are AI detectors biased against non-native English writers?](https://global100.org/forum/q/are-ai-detectors-biased-against-non-native-english-writers/): Yes, there is good evidence that they can be.

## [Detector tools compared](https://global100.org/forum/f/detector-tools/)
GPTZero, Turnitin, Copyleaks, Originality, QuillBot, Grammarly and ZeroGPT: what each one measures, how accurate it is in tests, and why they disagree.

- [Why do GPTZero, ZeroGPT, QuillBot and Grammarly give different AI scores?](https://global100.org/forum/q/why-do-gptzero-zerogpt-quillbot-and-grammarly-give-different-ai-scores/): They disagree because they are answering different questions with different models, different training data and different cut-offs.
- [Which free AI text detectors are actually worth trying for a quick check?](https://global100.org/forum/q/which-free-ai-text-detectors-are-actually-worth-trying-for-a-quick/): I am a freelance copywriter.
- [Can an AI detector tell which model wrote something (ChatGPT vs Claude vs Gemini)?](https://global100.org/forum/q/can-an-ai-detector-tell-which-model-wrote-something-chatgpt-vs-claude/): I get this question from colleagues often enough that I want to see how people here handle it.
- [Is Originality.ai (or any AI detector) good enough to screen freelance writers before paying them?](https://global100.org/forum/q/is-originalityai-or-any-ai-detector-good-enough-to-screen-freelance/): Side project question rather than a day job one.
- [A client's AI detector flagged my human-written marketing copy. What can I send them as proof?](https://global100.org/forum/q/a-clients-ai-detector-flagged-my-human-written-marketing-copy-what-can/): Landing page copy.
- [Is GPTZero accurate compared with Turnitin, Copyleaks and Originality.ai?](https://global100.org/forum/q/is-gptzero-accurate-compared-with-turnitin-copyleaks-and-originalityai/): GPTZero is accurate enough to flag obvious, unedited chatbot output and not accurate enough to prove anything on its own.

## [Turnitin, Canvas and schools](https://global100.org/forum/f/turnitin-and-schools/)
Which detectors colleges and teachers actually use, how the Turnitin AI writing report works, and what Canvas and Google Classroom do not check.

- [Turnitin gave 0% AI but my professor still says my essay reads like ChatGPT. What now?](https://global100.org/forum/q/turnitin-gave-0-ai-but-my-professor-still-says-my-essay-reads-like/): I hope it is alright to ask this here.
- [Why does Grammarly (or spell-check and editing) make my essay score as AI?](https://global100.org/forum/q/why-does-grammarly-or-spell-check-and-editing-make-my-essay-score/): I am a second-year international student and English is my third language.
- [What AI detector do colleges and teachers actually use, if any?](https://global100.org/forum/q/what-ai-detector-do-colleges-and-teachers-actually-use-if-any/): Most institutions that check for AI do it through Turnitin, because it already sits inside their learning platform.
- [Does Turnitin check for AI, and what does the instructor actually see?](https://global100.org/forum/q/does-turnitin-check-for-ai-and-what-does-the-instructor-actually-see/): Yes, if the institution licenses and enables it.

## [Academic integrity](https://global100.org/forum/f/academic-integrity/)
Detector flags in coursework, due process for students, how to document your own writing process, appeals, and the policy choices instructors face.

- [My humanities department wants to ban detectors and go oral exams only, is that realistic?](https://global100.org/forum/q/my-humanities-department-wants-to-ban-detectors-and-go-oral-exams-only/): Our humanities department has had enough of detector scores and the arguments that follow them.
- [Student admits using AI for an outline only, is that misconduct under a typical policy?](https://global100.org/forum/q/student-admits-using-ai-for-an-outline-only-is-that-misconduct-under/): A tenth grader came to me before I had to ask.
- [Is a screenshot of an AI detector result worth anything as evidence?](https://global100.org/forum/q/is-a-screenshot-of-an-ai-detector-result-worth-anything-as-evidence/): A procedural question from my side of the desk.
- [Should our university run AI detection at all, or write a policy that works without it?](https://global100.org/forum/q/should-our-university-run-ai-detection-at-all-or-write-a-policy-that/): I sit on the committee revising our academic integrity code, and I would value the experience of others here before we table a recommendation.
- [Can a teacher prove I used AI if I have my Google Docs version history?](https://global100.org/forum/q/can-a-teacher-prove-i-used-ai-if-i-have-my-google-docs-version-history/): My daughter is 16.
- [What should a student do if an AI detector flags their work?](https://global100.org/forum/q/what-should-a-student-do-if-an-ai-detector-flags-their-work/): Stay calm, gather evidence of how you wrote the work, and ask for the specific basis of the concern in writing.

## [AI images and photos](https://global100.org/forum/f/ai-images/)
Telling whether a picture is AI generated: the visual tells, the detector tools, and what metadata can and cannot prove.

- [Do AI image detectors work on screenshots and compressed social media copies?](https://global100.org/forum/q/do-ai-image-detectors-work-on-screenshots-and-compressed-social-media/): Most of what reaches our desk is not an original file.
- [How do I check whether a LinkedIn profile photo is AI generated?](https://global100.org/forum/q/how-do-i-check-whether-a-linkedin-profile-photo-is-ai-generated/): I run trust and safety at a marketplace, and a growing share of the seller accounts we review have a polished headshot and a thin, slightly generic professional story.
- [Are AI image detectors reliable, and what do the tests show?](https://global100.org/forum/q/are-ai-image-detectors-reliable-and-what-do-the-tests-show/): The best commercial detectors score very well on images from generators they were trained on, and much worse on new generators, edited images and adversarial protection.
- [How can you tell if an image is AI generated?](https://global100.org/forum/q/how-can-you-tell-if-an-image-is-ai-generated/): Usually you cannot tell with certainty from the pixels alone.

## [Deepfakes and video](https://global100.org/forum/f/deepfakes-and-media/)
Synthetic faces and edited video: what people can and cannot spot by eye, how deepfake detectors work, and the conditions under which they fail.

- [Can a deepfake pass a video job interview, and how do recruiters check?](https://global100.org/forum/q/can-a-deepfake-pass-a-video-job-interview-and-how-do-recruiters-check/): I run trust and safety for a marketplace, and we are about to hire a batch of remote contractors for moderation and support roles.
- [How do I spot an AI-generated product review before I buy?](https://global100.org/forum/q/how-do-i-spot-an-ai-generated-product-review-before-i-buy/): I work on trust and safety for an online marketplace, so I spend my days looking at reviews that someone wants me to believe, and I am still unsure what to tell shoppers.
- [Our school wants to buy a deepfake detector for staff. What should we look for?](https://global100.org/forum/q/our-school-wants-to-buy-a-deepfake-detector-for-staff-what-should-we/): I teach English at a secondary school, and I have been asked to sit on a small group that will recommend whether the school buys a deepfake detector for staff.
- [How do I verify a viral video is real before my newsroom runs it?](https://global100.org/forum/q/how-do-i-verify-a-viral-video-is-real-before-my-newsroom-runs-it/): Photo editor at a mid-sized daily here.
- [Can people reliably spot an AI-generated face just by looking?](https://global100.org/forum/q/can-people-reliably-spot-an-ai-generated-face-just-by-looking/): No.

## [AI voice and audio](https://global100.org/forum/f/ai-voice/)
Cloned voices, scam calls and audio deepfakes: how voice detection works and what to check before you trust a recording.

- [How are AI-cloned voices used in election robocalls, and does anyone detect them in time?](https://global100.org/forum/q/how-are-ai-cloned-voices-used-in-election-robocalls-and-does-anyone/): Election season brings back a worry that I cannot settle from reading.
- [Can AI voice detectors run on a live phone call, or only on recordings?](https://global100.org/forum/q/can-ai-voice-detectors-run-on-a-live-phone-call-or-only-on-recordings/): ok so this came up after a few of you on the forum were talking about family emergency scam calls. i make a podcast and i've played around with voice cloning for fun, so i know how convincing it can b
- [My bank wants my voice as a password. Is voice ID safe against AI cloning?](https://global100.org/forum/q/my-bank-wants-my-voice-as-a-password-is-voice-id-safe-against-ai/): ok so this one is personal. my bank nags me to enrol in voice ID every time I call ("my voice is my password") and now the company I do contract audio work for wants a voice check to get into the payr
- [How accurate are AI voice detectors in real conditions?](https://global100.org/forum/q/how-accurate-are-ai-voice-detectors-in-real-conditions/): In controlled benchmarks the best systems miss only a few percent of fakes, but accuracy collapses on audio from unseen generators, phone codecs and real-world recordings, where published tests show e
- [How do you tell if a voice recording or call is AI cloned?](https://global100.org/forum/q/how-do-you-tell-if-a-voice-recording-or-call-is-ai-cloned/): You mostly cannot tell by ear, and neither can the detection tools with certainty.

## [Provenance and C2PA](https://global100.org/forum/f/provenance-and-c2pa/)
Content Credentials, C2PA manifests, watermarks and signed capture: proving where a file came from and how it was edited instead of guessing from pixels.

- [Can I watermark my own writing so I can prove it is mine later?](https://global100.org/forum/q/can-i-watermark-my-own-writing-so-i-can-prove-it-is-mine-later/): After the false flag a few weeks ago, I want a better answer than "trust me" the next time a client questions a piece.
- [What does the Content Credentials pin on an image actually tell me, and can it be faked?](https://global100.org/forum/q/what-does-the-content-credentials-pin-on-an-image-actually-tell-me/): We have started seeing a small "CR" pin on images that reach our desk, from agency feeds and from a couple of platforms.
- [How do I prove my own photograph is real when a client asks for evidence?](https://global100.org/forum/q/how-do-i-prove-my-own-photograph-is-real-when-a-client-asks/): Photo editor by day, and I still shoot commissions on the side.
- [Does Google's SynthID or Content Credentials show up when I download an image from Gemini or ChatGPT?](https://global100.org/forum/q/does-googles-synthid-or-content-credentials-show-up-when-i-download/): Copywriter.
- [What is C2PA, and do Content Credentials actually help?](https://global100.org/forum/q/what-is-c2pa-and-do-content-credentials-actually-help/): C2PA is an open standard for attaching signed, tamper-evident information about where a piece of media came from and how it was edited.

## [Humanizers and rewriting](https://global100.org/forum/f/humanizers-and-rewriting/)
Paraphrasers and humanizers: what they change in a text, how detectors respond in published tests, and where the line sits for honest use.

- [Is using a paraphrasing or humanizing tool academic misconduct?](https://global100.org/forum/q/is-using-a-paraphrasing-or-humanizing-tool-academic-misconduct/): It depends on what the assessment allows and whether you disclosed it.
- [Do AI humanizers and paraphrasers actually beat AI detectors?](https://global100.org/forum/q/do-ai-humanizers-and-paraphrasers-actually-beat-ai-detectors/): Often, yes, at least for a while: published attacks show that paraphrasing AI text sharply cuts detection rates on most style-based detectors.

## [Policy, law and disclosure](https://global100.org/forum/f/policy-and-law/)
Deepfake laws by jurisdiction, platform labelling rules, AI disclosure obligations, and what is legal to make, share or report, with links to the statutes.

- [Does Google penalise AI-written blog posts, and does it run a detector?](https://global100.org/forum/q/does-google-penalise-ai-written-blog-posts-and-does-it-run-a-detector/): Freelance copywriter here.
- [Are AI detectors allowed under GDPR when the school runs student essays through a US company?](https://global100.org/forum/q/are-ai-detectors-allowed-under-gdpr-when-the-school-runs-student/): I study law at a university in the EU and I am writing a short paper on automated detection in education.
- [Can I use the EU AI Act's labelling rules as a reason to require AI disclosure inside my company?](https://global100.org/forum/q/can-i-use-the-eu-ai-acts-labelling-rules-as-a-reason-to-require-ai/): I run trust and safety for a marketplace with sellers and buyers in the EU and the US.
- [Are AI "nudify" or face-swap images of a student a crime, and what does the school have to do?](https://global100.org/forum/q/are-ai-nudify-or-face-swap-images-of-a-student-a-crime-and-what-does/): A student came to me after class on Friday because she did not know who else to tell.
- [A scam call used my relative's cloned voice. What do we report, and to whom?](https://global100.org/forum/q/a-scam-call-used-my-relatives-cloned-voice-what-do-we-report/): My mother got a call on Tuesday afternoon.
- [Do you have to disclose AI-generated content, and who requires labels?](https://global100.org/forum/q/do-you-have-to-disclose-ai-generated-content-and-who-requires-labels/): Increasingly yes, depending on where you publish and what the content is.
- [Is it illegal to make or share a deepfake of someone?](https://global100.org/forum/q/is-it-illegal-to-make-or-share-a-deepfake-of-someone/): Sometimes, and the law is tightening fast.

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