Since the emergence of ChatGPT, a chatbot that can generate realistic text based on different prompts that a user enters, teachers and educators have been worried about the possibilities of cheating that machine learning helps enable.To combat AI plagiarism and keep the tool in check, Princeton computer science and journalism student Edward Tian spent his winter break building GPTZero, an app that attempts to detect whether or not a body of text was human-written or AI-written.“Language models and machine learning for so long have been notorious for being a black box, where we don't know what's going on under the hood, and with GPTZero, I want to start pushing back against that," Tian explained.Users can input five or more words into a text box and the app—which is itself powered by machine learning—will analyze the text to determine if it’s been generated by AI.So, a human-written text would have high perplexity, something very unfamiliar to an AI model, and exhibit properties of burstiness, which are non-common items that appear in random clusters, rather than being uniformly distributed."