Analysis of an intonational contour generally used to convey uncertainty about the appropriateness of some evoked scale or scalar value (as in "Anna may marry Manny") is extended to accommodate both uncertainty and incredulity interpretations. This paper proposes a more general account of L*+HLH%, based on an acoustic and pragmatic investigation of the contour. Previous interpretations for uncertainty are discussed. The additional incredulity interpretation is analyzed in comparison with and in conjunction with the uncertainty theory, and a new interpretation of the model that reconciles the two is proposed: that the contour can convey lack of speaker commitment to the appropriateness of an evoked scale or scalar value. Additional empirical research is planned. (MSE)