I always thought Derek Sivers covered this well with his Delegate Or Die essay: http://sivers.org/delegate http://sivers.org/delegate If they've got the time

I always thought Derek Sivers covered this well with his Delegate Or Die essay: http://sivers.org/delegate http://sivers.org/delegate If they've got the time to answer the questions, then at least that answer should be documented. Even if they don't have time to document everything, you can at least document the parts that people are actively asking / unsure about, and having a fresh pair of eyes document the system can be helpful (can make the documentation easier to understand for newbies, who are the target audience for documentation usually).