About: http://webisa.webdatacommons.org/403527988

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	Your scenario of the one player who buys the ninja book and thinks that therefore ninjas will be accepted into the game is a good example of when it is not ever discussed but the scope is breached nonetheless.
http://www.w3.org/ns/prov#wasQuotedFrom	indie-rpgs.com