I had to do my RS (religious studies) GCSE exam today (national tests at age 15/16), which is compulsory in my school as it's CofE and I just couldn't resist using antedeluvian - I couldn't quite find a context for postdeluvian. I'm not overly chuffed at being made to do RS as the curriculum is so limiting over here so I just do what I can to make the exam fun by adding in extra essays and stuff - my RS teacher once accused me of being too(!) philosophical in my essays - maybe that'll stump them... (perhaps not?)
My friends think I'm crazy.