Something I knocked up last night - inspiration obvious :)
Not a clever idea I know, nor particularly exciting - but struck me as amusing to imagine what would happen in the Foundation universe. If nothing else some good practice.
The negative aspect I felt was necessary to prevent this thing being far to useful/powerful to the Foundation.
Also may add a test log which explores various conditions, as i've worked some out.
I deliberately modified the details to make it less "cheesy" - but not sure if would be stronger if I made it match real life?