Perhaps this should be in humour??
Key's own office certainly can't; its response to an official information request was that it had no data to disprove the theory.
The response came after Shane Warbrooke requested "any evidence to disprove the theory that Mr John Key is in fact a David Icke-style shape reptilian shifting alien ushering humanity towards enslavement".
Key's chief of staff responded this month, saying "no such information existed" to probable cries of "they would say that" from conspiracy theorists.