Returning to non-entailed presuppositions again

Recent work by Sudo (2012) and Klinedinst (2016) proposes a new perspective ondifferences between classes of presupposition triggers, with an empirical split roughly mirroringAbusch’s (2002) hard vs. soft distinction and related notions. These two authors proposethat triggers differ in whether or not their presuppositional content simultaneously affects thecalculation of the presuppositions and of the entailments of the sentences in which they appear.Drawing on a proposal by Glanzberg (2005) we formulate the Removability/Independence Hypothesis:triggers that do not affect entailments are triggers that can be left out of sentenceswithout affecting interpretability. We experimentally test the hypothesis by embedding return,(go) again and (go) back in non-monotonic environments, which Sudo argues to elicit differencesin presuppositions and entailments. Our results provide clear evidence against the RIhypothesis: whereas only the trigger return is crucial for the sake of interpretability, all threetriggers produced similar results. At the same time, data for the triggers stop and also, includedas controls, lend further support in favor of Sudo’s entailment-contrast proposal.Keywords: presuppositions, entailment, hard/soft distinction.