"So OO is not a well defined concept." Hmmm, last I checked OO was pretty well defined. The implementations of so-called OO languages, on the other hand, that'

"So OO is not a well defined concept." Hmmm, last I checked OO was pretty well defined. The implementations of so-called OO languages, on the other hand, that's another story. If Jonathan or Paul have any doubts on the concept as it was originally conceived, they don't really have to go far. Just ask Alan Kay. He's still alive! http://userpage.fu-berlin.de/~ram/pub/pub_jf47ht81Ht/doc_kay_oop_en http://userpage.fu-berlin.de/~ram/pub/pub_jf47ht81Ht/doc_kay...