Title
Probabilities of conditionals and previsions of iterated conditionals
Abstract
We analyze selected iterated conditionals in the framework of conditional random quantities. We point out that it is instructive to examine Lewis's triviality result, which shows the conditions a conditional must satisfy for its probability to be the conditional probability. In our approach, however, we avoid triviality because the import-export principle is invalid. We then analyze an example of reasoning under partial knowledge where, given a conditional if A then C as information, the probability of A should intuitively increase. We explain this intuition by making some implicit background information explicit. We consider several (generalized) iterated conditionals, which allow us to formalize different kinds of latent information. We verify that for these iterated conditionals the prevision is greater than or equal to the probability of A. We also investigate the lower and upper bounds of the Affirmation of the Consequent inference. We conclude our study with some remarks on the supposed “independence” of two conditionals, and we interpret this property as uncorrelation between two random quantities.
Year
DOI
Venue
2020
10.1016/j.ijar.2020.03.001
International Journal of Approximate Reasoning
Keywords
DocType
Volume
Coherence,Conditional random quantities,Conditional probabilities and previsions,Conjoined and iterated conditionals,Affirmation of the Consequent,Independence and uncorrelation
Journal
121
Issue
ISSN
Citations 
1
0888-613X
0
PageRank 
References 
Authors
0.34
0
4
Name
Order
Citations
PageRank
Giuseppe Sanfilippo120417.14
Angelo Gilio241942.04
David Over3114.13
Niki Pfeifer4749.14