In the world of corporate communications, a big part of delivering a message involves defining the terms of the discussion. Over the past few weeks, both Apple CEO Steve Jobs and Facebook CEO Mark Zuckerberg have been caught up in this action while discussing the mobile space. During the most recent Apple quarterly earnings call, Jobs tried to redefine what an open platform is when comparing iOS to Android. Zuckerberg raised eyebrows last week when he declared that the slim and lightweight iPad was a computer, not a mobile device.