I just wrote the following in my feedback on an essay:
- Don't plagiarise;
- Don't quote Wikipedia;
- Therefore, don't plagiarise from Wikipedia.
Actually, the student in question is a decent chap who was probably just having a brainstorm at the time, though it's amazing how many students don't get this simple logic. Maybe he was so embarrassed at having used Wikipedia he couldn't bear to put in the citation.
