 Semantic nonfactualism, the non-cognitivist commitment to the view that moral judgments do not express propositions or predicate properties, rules out one simple way of explaining matters. (But see the discussion of hybrid theories below and in the supplementary document   Embedding Problem Response Strategies.) If there is no proposition expressed in normal predicative uses of moral expressions we eliminate one candidate for a constant element that generates relations of implication with other expressions embedding the same form of words. Arguably we need some other candidate to provide the commonality. As Geach noted, it isn’t plausibly the attitude expressed by the a free-standing sentence since this feature doesn’t always survive embedding as we saw. Perhaps it might be some predictable function of this attitude. That would serve the goal of providing a compositional semantics for the terms in question. 