# AI Detectors (optional exercise)

There are a number of online providers that allow PDFs to be examined for AI-generated text or plagiarism. Download [ufz-leipzig.pdf](ufz-leipzig.pdf) and test such a system. Although the text is obviously AI-generated, some AI detectors fail to recognize it as such. Why?
* [scispace](https://scispace.com/ai-detector)
* [isgen.ai](https://isgen.ai)
* [justdone](https://justdone.com/ai-detector)