I think that's a type of self-constructed self-assuring extrapolation. The concept that because the things that one individual wants are available, surely all

I think that's a type of self-constructed self-assuring extrapolation. The concept that because the things that one individual wants are available, surely all things for all individuals are available. Looking at my paper books; Pooley's Flight Guide 1985; FIDO - Flying Through Fog; The Engineering History of the North of Ireland. Just three volumes out of thousands that are slowly slipping into oblivion. The long tail of the Internet is not long enough to preserve all knowledge, particularly at the rate libraries are discarding old and 'unwanted' books.