Donoghue, John2024-04-262024-04-261996https://hdl.handle.net/20.500.14394/40828This is the pre-published version which is collected from arXiv.I discuss some recent results on the systematic behavior of final state rescattering which makes use of the limit of a heavy B meson. The results suggest that soft final state interactions do not disappear in the large $m_B$ limit. Soft and hard final state phases can both contribute to CP violating asymmetries in B decay. The way that the soft phases occur is interesting theoretically and suggests the violation of local quark-hadron duality.Physicsarticle