As an educator, I base my suspicions on three hallmarks:<p>- verbose, insightful, comprehensive: I teach beginners, and even advanced students know not to waste effort on a 3 point response with five paragraphs.<p>- itemized lists: LLM will frequently spit out a numbered or bulleted list that's well-organized, in many contexts.<p>- total ignorance of our scenario: the clincher. A human student is usually aware of the background of the questions we're asking, but if they prompted an LLM, odds are that they wrote a simple, isolated prompt. A bunch of irrelevant crap-shoveling is a great way to tip us off. Thanks.<p>These three hallmarks typically encompass third-party plagiarism, too.