Abstract
In this paper, the author investigates a new class of fuzzy random sets as the vague perception of a crisp phenomenon or a crisp random phenomenon. First, considering that the vague perception of a crisp phenomenon fluctuates slightly but randomly by the state of a capricious person's mind, a new class of fuzzy random set is introduced. Secondly, the fuzzy random set is generalized as the vague perception of a crisp random phenomenon. The expectations of introduced fuzzy random sets are investigated from the viewpoint of the multivalued logic proposed by Kwakernaak[1].
