Anway, he mentioned Wheeler's paper on Delayed Choice Gedankenexperiment and so off I went searching for a pdf version.
http://www.sciencedirect.com/science/book/9780124732506
Possibly my ddgfu is subpar but I find it outrageous that such a seminal paper is not in public domain!
[p.s. oh yes, Ask HN. Implied question being, what is opionion of this forum? Is it reasonable for absolutely key (and unclassified) scientific output to be behind a pay wall, in this case after ~3+ decades?]