The man nods.

"Very well... I guess we can start by me telling me the details of my life that I have shared with the rest of the staff so should you be probbed or asked you can answer correctly..." he tells you and you spend the next hour or so with him explaining his background, family status, friends etc.

You feel confident afterwards that you can cover any such details if it comes up.

"I can also give you descriptions of who the people I associate with in the house are and perhaps some info about what I know on them... but... hmm... would you be able to enter the house invisible with me so you can see the interactions for yourself?"