| Summary: | This article shows that the deontic modals <em>must</em>, <em>should</em> and <em>supposed to</em> are all Positive Polarity Items which can raise in order to avoid being in an anti-licensing environment; it also establishes that <em>should</em> has a dual nature, i.e., it is not just a PPI, but it is also a neg-raising predicate, which can achieve wide scope through a homogeneity inference, and that <em>supposed to</em>, also a PPI, exhibits a neg-raising behavior under certain pragmatic conditions which shed new light on the neg-raising phenomenon.
http://dx.doi.org/10.3765/sp.8.4
<a href="http://semantics-online.org/sp-bib/homer-2015-polarity.bib">BibTeX info</a>
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