Define "promptly," then? Because I nkow a
few articles I recently
finished that use materials only available in one library across the
country from me. Will verification of those sources not be prompt enough
for someone in, say, Chicago?
It doesn't need to be promptly verifiable by everyone. A TV show that
can't be seen legally is not verifiable by anyone. We shouldn't be
relying on illegal copies and fansite summaries for our sources.
I wish I could think of a way to make it work - I'm very active in
WikiProject Stargate and we use episodes as sources all the time - but
a source no-one can access is not verifiable.