I dunno -- for all the advantages, technology has also made us incompetent!
I was born in the days when the only hand-held device in use daily was a blow dryer -- no phones, tablets, etc., and where we learned our landline phone number and house address at around pre-school age. Admittedly, today, I don't recall phone numbers of friends that came into my life since cellphones-- unlike even some non-working numbers pre-mobile phones, still etched into my brain.
Similar to DR, I'm thinking of another case in NM where videos were released of the defendant, a 19-year old HS Senior, who also could not answer what IMO, were basic questions about herself such as her SSN#, place of birth, and told investigator she needed to ask her mother!
Ultimately, on his own, DR did recognize that US mail inside the house delivered to the step-dad would have the full, correct address, and DR was able to provide his location with minimal delay. I think I can see where he may have known his location simply as the ABC Apartments, #201, in Hialeah.
In both cases above, I think at age 8, I would have been too embarrassed to respond 'I don't know' to the question of my home address. Instead, I'm now embarrassed when I'm asked a question and have to respond that the answer is here on my handset but I don't know how to look it up without disconnecting our phone call!
MOO