Pragmatic Entailment and Questions

Sentential structures may contain positions that can be filled by other sentential structures: (1) Although —, we arrived late. (2) Galileo believes that —. (3) It is too early for —. (4) If —, then Monaco will attack. I will call such structures environments and symbolize their semantic content, with a corresponding empty slot, as U — V, U’ — V’ etc. If the sentential structure S that fills the empty slot has propositional content P, then the propositional content of the entire construction (environment filled in by S) will be UPV.