CHAIRPERSON
Quite clear we are concerned with the evidence that is adduced before us. The purpose of pointing out any difference in the evidence which they are giving now from what they had said in some other proceedings is done with a view to criticising the witness on the ground that his evidence is not reliable. His evidence, his recollection may be faulty or in some instances it may be said that he is purposely not telling the truth. Those are matters for argument.