Heinz von Foerster's concept of operational closure:
To date, a number of questions remain unresolved in the work with the concept of Autopoiesis. One of these questions concerns Luhmann's proposal to temporalize the notion of the Component of autopoietic systems.
It is *events* [⇒ Event (Ereignis)] that self-referentially differentiate and reproduce autopoietic systems. Events appear and disappear. They have a punctually stable but fleeting Existence.
A connecting event in search of connecting events – DALL·E png 
In this Form, events reproduce the Problem they solve. They are a connecting event in search of connecting events.
In sociology, this is immediately obvious. Both Action and Communication can only be thought in this temporalized sense. Any structure beyond this is an Expectation that certain events will or will not occur.
This idea is compatible with Heinz von Foerster's concept of operational closure: operationally closed systems are subject to the condition – their only condition – that every end is also a beginning.
This implies a temporal understanding of Operation, even though von Foerster does not make this explicit.
Possibly this is easier to think of in physics than in biology. Electronic impulses have per se an ephemeral identity.
How would this idea work in the description of neuronal systems, immune systems, organisms?
DOT FROM lambda-browsing
pages/operational-closure
Generate variations
* Abstract Syntax Trees, AST hat can be both visualized and queried.
⇒ Kent Beck's ⇒ Limbo
acrobatic dance of West Indian origin, in which the dancer bends the body back from the knees and moves with pushing dance steps under a crossbar
Another object is a Hand, that is the abstract representation of the user input device. It also is just a Box in the display scene and its position is usually correlated with the location of the pointing device cursor. We currently do not support multiple pointing devices, but Morphic implemented such a feature just by having an array of Hands.
The void-based structure of Peirce's and Spencer Brown’s iconic logics challenge a foundational assumption of Western thought, that Rationality requires Dualism.
For many people, their needs are not recognized or understood. In other words, much of IT education could be a case of teaching in search of a learner.