The goal of this paper is to propose a unified account for different puzzles on upward monotonicity under desire. Conclusions drawn by monotonicity will be shown to license some additional inferences by pragmatic effects. It is assumed that a predicate can convey a potential disjunctive meaning via reinterpretation and hence gives rise to free choice effects. In addition, a logic-based framework is presented to capture free choice inferences and the reinterpretation process.