What would one do with a time machine (that goes back 400 years) knowing that no major changes could be made to history? What languages would be the most useful to know? What would be an excuse to go to any time period for China? I know that I am supposed to research, but how do I translate the negative symptoms of schizophrenia into writing? Would it be realistic to go to right after the American Civil War and stay for a week just to pick up a few items that will become valuable later?