"Abstract abstraction" is a term that can refer to the concept of abstraction as it is used in object-oriented programming. Abstraction is the process of defining a set of common characteristics or behaviors for a group of related objects. This process involves creating an abstract class or interface that defines the common properties and behaviors that are shared by the group of objects.

In the context of object-oriented programming, an abstract class is a class that cannot be instantiated directly, but is instead intended to be subclassed by other classes. An abstract class can contain abstract methods, which are declared without an implementation, as well as concrete methods, which are implemented in the abstract class. Subclasses of an abstract class must provide implementations for any abstract methods that are declared in the abstract class.

An interface is another form of abstraction in Java, which defines a set of method signatures that a class must implement if it implements that interface. An interface defines only the signatures of methods, but not their implementation. A class that implements an interface must provide an implementation for all of the methods declared in the interface.

The concept of "abstract abstraction" can refer to the process of defining abstract classes or interfaces to create a higher level of abstraction in a program. This higher level of abstraction can help to simplify the design of a program and make it easier to maintain and extend over time. By defining abstract classes or interfaces, developers can create a common set of behaviors or properties that can be shared by multiple classes, reducing code duplication and improving the overall structure and organization of a program.