  The LHCb experiment has measured CP violation (CPV) across the Dalitz plot of
charmless decays of B+ mesons to 3 charged tracks, namely in K{\pi}{\pi}, KKK,
{\pi}{\pi}{\pi} and {\pi}KK final states, with strikingly large CPV that vary
strongly with Dalitz variables. Identifying these processes with b -> sqq(bar),
sss(bar) and b -> dqq(bar), dss(bar), where q = u, d, then the "sum rule" that
requires two-loop absorptive parts by unitarity works well for inclusive b -> s
CPV, but less well for inclusive b -> d case. We elucidate the situation, and
argue that the 30 year old unitarity/CPT argument is valid to this day, while
affirming quark-hadron duality.
