Questions need to be raised about the capacity of our Prime Minister, after yet another inexplicable memory lapse from our nation's leader.
John Key has been under pressure for weeks over what he knew about Kim Dotcom and the illegal GCSB monitoring of Mr Dotcom.
But Mr Key has struggled to recall anything about Mr Dotcom. Despite a number of people at high levels within government knowing in 2011 about Dotcom's situation and the FBI's interest in the man, Mr Key claims he first heard of Dotcom the day before the raid on his Coatesville mansion.
Mr Key claimed he first learned of the GCSB's investigations into Dotcom on 17 September this year, but it turned out that he'd forgotten he had been told by the spy agency of their interest in Dotcom back in February.
Now the Labour Party leader, David Shearer, has claimed that a tape exists of a speech by Key to GCSB staff in which he made a quip about Dotcom. Rather than deny the allegation outright, Key has responded that he has no recollection of the alleged incident.
There are questions about whether the allegation from Shearer can be backed up. Regardless of whether the allegation is true, the fact that Mr Key is unable to categorically deny the allegation indicates a grave deterioration in the memory capacity of the Prime Minister.
Loss of memory is often associated with the onset of old age. But younger people have been known to suffer from memory loss, and the causes can vary.
There is in fact evidence that Mr Key's memory failings go back a number of years. He has claimed in the past not to be able to remember where he stood on the issue of the 1981 Springbok Tour, despite his being an avid sports fan.
And in recent years Key has taken positions on issues completely at variance with positions taken in the past.
One interpretation of such behaviour is that Mr Key is simply moving from one position to the next as it suits him politically, and that he is governed by political expediency rather than any yearning to tell the truth.
The alternative, that Key's mental faculties are slipping, will be of concern to his fellow MPs. It is difficult to imagine National winning a third term in office while their leader struggles to remember important information.