Measuring phases in the Cabibbo-Kobayashi-Maskawa matrix through CP asymmet
ries in B decays is a major goal of current and future experiments. Methods
based on charge-conjugation and isospin symmetries involve very little the
oretical uncertainties, while schemes based on flavor SU(3) involve uncerta
inties due to SU(3) breaking. Resolving these uncertainties requires furthe
r studies involving a dialogue between theory and experiments. (C) 2001 Els
evier Science B.V. All rights reserved.