"There are so many times where, if I could sit down with the original program author for 5 - 10 minutes, I could understand more from that interactive back-and-forth than several hours of reading code in solitude."
Peter Naur wrote a paper in 1985 where he conjectured that this seemed to be a universal law. No matter how much documentation authors provided, new programmers still needed to talk to them. http://alistair.cockburn.us/ASD+book+extract%3A+%22Naur,+Ehn...