To demand that he provide an entire list of every person that he's ever spoken to in the office of the Prime Minister is a ridiculous question, and to badger him as though he is trying to evade the question when the question is an impossible one to answer off the top of his head.
Exiger que le témoin fournisse la liste de tous ceux avec qui il a parlé au Cabinet du Premier ministre, c'est ridicule, et le harceler comme s'il essayait d'éluder la question alors qu'il est impossible de répondre spontanément à la question.