In a recent paper, Banuls and Bernabeu have claimed the existence of a new
form of indirect CP violation which would have its most prominent manifesta
tion in the B-d-(B) over bar(d) system. I analyse this claim in detail. I e
mphasize the fact that it is necessary to take into account the precise exp
erimental method if one is to identify correctly the weak phase that one is
about to measure. (C) 1998 Elsevier Science B.V. All rights reserved.