We investigate the meaning of the high-rise question contour in Englis
h, described in Pierrehumbert (1980) as 'HH H%'. Previous studies hav
e characterized this contour in terms of speaker attitude or in terms
of the relationship of the propositional content of utterances to some
aspect of their discourse context. Based on an analysis of naturally-
occurring data, we propose that speakers employ HH H% to convey that
the propositional content of the utterance is to be added to speaker a
nd hearer's 'mutual beliefs' (those shared by speaker and hearer and b
elieved by them to be shared), and to question whether the hearer can
relate that propositional content to the contents of the hearer's own
(unshared) beliefs.