…the probability is realised by a mental
clause as if it were a figure of sensing. Being metaphorical, the clause serves not only as the projecting
part of a clause nexus of projection, but also as a mood Adjunct, just as probably does. The reason for regarding this as a metaphorical variant is
that the proposition is not, in fact, ‘I think”; the proposition is ‘it is
so’. This is shown clearly by the
tag… . It is the fact that a
mental clause is a modal clause and serves as mood Adjunct that explains the
tag… the Mood tag picks up the Mood element of the modalised proposition… .