The same way you did so before LLMs existed - you rely on in-class assignments, or take-home assignments that can't be gamed. Giving out purely take-home writi

The same way you did so before LLMs existed - you rely on in-class assignments, or take-home assignments that can't be gamed. Giving out purely take-home writing assignments with no in-class component (in an age where LLMs exist), is akin to giving out math assignments without a requirement to show your work (in an age where calculators exist). Many years before LLMs were ever a thing, I recall being required to complete (and turn in) a lot of our research and outlining in class. A plain "go home and write about X topic" was not that common, out of fear of plagiarism.