Taking the assumption that time is linear (


), I would categorize buddhism this way:
Empty individualism:
There is the illusion of self - a function of mind which refers back to itself. It not really is a permanent thing itself, but creates the trick of continuity due to reference points which are made up. Basically the pattern: Taking a coordinate in reality and cling to it as seperate, refer back to it to create the illusion of identity, doing this process again and again to create continuity. But this is a functionwhich is empty of identity - since open.
Open individualism:
The self is a illusion, it doesn't exist. All the qualities of experience, that arise, come and go and none qualifies as a stable ground for identity.
Where do they arise? That's the part, where you could stick buddhism to open or empty individualism. If there's anything permanent, a experiencer, a watcher, a self, an awareness, etc. etc., which could be located in the time stream of reality, it would be empty.
But buddha menant: no waaaay there's anything like that - so it's open. I guess Kolak is taking the mind stream or something as paradigm that qualifies for empty.