Compositionally incongruous sentences such as "No detail is too unimportant to be left out" are often assigned plausible non-compositional meanings (~ "Don’t leave out details"). The present research shows that moving the incongruous degree phrase to the beginning of the sentence ("Too unimportant to be left out is surely no detail") results in an attenuation of this semantic illusion, implying a role for incremental processing. Moreover, semantic operators cannot be readily applied to the generated propositions, and acceptability varies greatly between sentences and speakers, which is consistent with superficial interpretation. Implications of the present work with regard to the distinction between linguistic competence and performance are discussed, along with future directions for research.