Mike Mearls Clarifies the Definition of "Stand Alone" for "Tyranny of Dragons"

Mike has been taking some heavy hits in the social media arena. Well deserved hits, but hits none the less. So I give +Mike Mearls credit for tweeting away during the holiday weekend to clarify, clarify and occasionally obscure ;)

So, that 15% of the Player's Handbook that will go up for free online hand in hand with the release of the Starter Set? Looks like you'll need that to run Tyranny of Dragons. Unless Mike says something different tomorrow. Damn it Mike! One answer obscures the other!

So, do we really need the starter set? Would the 15% of the Player's Handbook suffice to run games between now and the end of time? How much of the magical 15% is also covered in the Starter Set?