That is incorrect in an academic context. Obviously different contexts have different expectations of citation and attribution, but plagarism is not just about

That is incorrect in an academic context. Obviously different contexts have different expectations of citation and attribution, but plagarism is not just about infringing someone's copyright by stealing their work verbatim. It's about misrepresenting someone else's ideas/research/analysis as your own. I can restate Plato's model of concrete things being mere shadows of abstract ideals however I damn well please, but if I don't mention that I got that idea from Plato, it's still plagarism.