This can be very useful so that every student can talk to historical persons and ask every question and know more and more about about that historical persons.can solve many queries and students can learn out of the books things and students don’t have burden to remember every historical event theories.even we can vertually made wars in computers with real situations can see what probability can happen. Even living personalities can be added to this and can be q&a with their respective permission.this can be so so so useful.