In my defense, it has to be said that using my textbook as an aid to design such a combat system would probably help me learn its contents much better.
On the other hand, somehow I suspect the exam graders won't necessarily understand what my writings mean. By the time that I've converted the whole contents of the textbook into a homegrown RPG system and start expressing everything in those terms it might not necessarily be very understandable... "Every point of psionic damage to the hippocampus prevents memories from the last 1d3 hours from being established into long-term memory. The crudest, wide-area mental attacks will scramble the brain's neuronal synchronization: each point of psionic damage that gets through the defenses will increase the difficulty of all mental tasks by one."
Cross-posted to xuenay