The first time I read The Rejection of Closure I had a very emotional reaction to it. Perhaps because I am a naturally irate person, or perhaps because I felt there was an advocacy for something I couldn't abide. I haven't read Lyn Heijinian's text in a very long time, but I'm always struck with the same problem: closure can not be opened by rejection. Rejection is a kind of closure. Closure turned on closure. When we reject something we deny its possibility. The very fact that could be "true".
The target is closure. The strategy is closure. The system is rejection. When we think about closure, we can think of it along an isomorphic echo as encasement, encapsulation, containment, envelopment, often in terms of human affect as being "closed off", or "not open", or "not-openminded." And it's really there that we get stuck.
In the end you're left with another kind of closure. A tacit acknowledgement in the reality/possibility of a "closure" and the rejection of part of that reality. I have in my lifetime found it far more liberating to reject the possibility of a closure. There is always a veritable regress of information implicit in even the simplest of utterances.