Hadronic Effects in Two-Body B decays

In these lectures I discuss the impact of soft hadronic physics on predictions for B decays. Unfortunately our tools for calculating these effects are limited; even after the use of the best available tools the resulting theoretical uncertainties are difficult to delimit, and can obscure tests for the presence of beyond-Standard-Model physics. The first lecture reviews what tools are available, the second reviews in more detail two examples of how these tools can be used.