Doctors or bio experts: help with Biology case study dealing with homeostasis please!?

If DI is a choice, then it sure sounds like it. However, I can't pinpoint the exact type of DI (neurogenic or nephrogenic), unless the disorientation is a clue. The dehydration and frequent urination are signs indicating DI, but those are not very specific, they result from poor water reabsorption by the kidneys (nephrogenic DI) or insensitivity to ADH (neurogenic DI).