Q: In this task, you are given a part of an article. Your task is to generate headline (title) for this text. Preferred headlines are under fifteen words.
The AGM theory of belief revision has be come an important paradigm for investigat ing rational belief changes. Unfortunately, researchers working in this paradigm have re stricted much of their attention to rather sim ple representations of belief states, namely logically closed sets of propositional sen tences. In our opinion, this has resulted in a too abstract categorisation of belief change operations: expansion, revision, or contrac tion. Occasionally, in the AGM paradigm, also probabilistic belief changes have been considered, and it is widely accepted that the probabilistic version of expansion is con ditioning. However, we argue that it may be more correct to view conditioning and expan sion as two essentially different kinds of belief change, and that what we call constraining is a better candidate for being considered prob abilistic expansion.
A:
Probabilistic Belief Change: Expansion, Conditioning and Constraining