The problem of when to use the evidence held is always a
difficult one. Too early a disclosure of precise information may
result in the purchaser telling little more than already known
leaving other information concealed. On the other hand, the
purchaser should not be permitted to commit themselves to anything
that is known to be factually incorrect.
In dealing with other matters, some refinement of approach is
needed.
If there is some independent evidence about the scale of a
transaction, which cannot be squared with the purchaser's
statements, (a newspaper cutting or advertisement, personal
observation perhaps), it may be better to go over the ground again,
by asking specifically directed questions, rather than to confront
them with the evidence
