Deletion of IBM OLIVER (CICS interactive test/debug)

Comment: which specific offline sources are you referring to? If you don't have ''specific'' offline sources in mind, this argument just seems to be a slight variant of /. Since no one in this world can have a ''comprehensive'' selection of offline sources, by that standard everything from that time period must be notable, since you'd never be able to prove there aren't, somewhere out there, offline sources which demonstrate notability which no one has seen yet. It's essentially demanding to prove a negative (no one can ever prove that no offline sources exist, since no matter how many offline sources you check, there will always be more that you haven't
Stance: comment
Cited policy: Wikipedia:Arguments to avoid in deletion discussions (WP:MUSTBESOURCES||WP:THEREMUSTBESOURCES)