The Prime Minister has become a law lecturer and informs us that “A prima facie case is not evidence of anything that will stand up in court.”
Grant from NZ Pundit, who is a lawyer, skewers the Prime legal expert by giving the definition from Butterworths Law Dictionary.
Prima facie case A litigating party is said to have a prima facie case when the evidence in his or her favour is sufficiently strong for his or her opponent to be called on to answer it. A prima facie case, then, is one which is established by sufficient evidence, and can be overthrown only by rebutting evidence adduced on the other side.
The NZ Herald also has some definitions.