If cases are put aside where a trial has miscarried through misdirection, misreception of evidence, wrongful rejection of evidence or other error and if cases of surprise, malpractice or fraud are put on one side, it is essential to give effect to the rule that the verdict, regularly obtained, must not be disturbed without some insistent demand of justice. The discovery of fresh evidence in such circumstances could rarely, if ever, be a ground for a new trial unless certain well-known conditions are fulfilled. It must be reasonably clear that if the evidence had been available at the first trial and had been adduced, an opposite result would have been produced or, if it is not reasonably clear that it would have been produced, it must have been so highly likely as to make it unreasonable to suppose the contrary. Again, reasonable diligence must have been exercised to procure the evidence which the defeated party failed to adduce at the first trial.
The words "rarely, if ever" in the above passage leave open the possibility of exceptional circumstances justifying a departure from the general rule even in the class of case to which the general rule is directed. It is not, however, necessary to pursue that aspect of the matter for the purposes of the present case. Nor is it necessary to consider whether the somewhat obscure qualification expressed by Dixon C.J. in the words "or, if it is not reasonably clear that it would have been produced, it must have been so highly likely as to make it unreasonable to suppose the contrary" represents other than an illusory relaxation of the primary test (i.e. "reasonably clear that an opposite result would have been produced").
1. (1948) 76 C.L.R. 632.
2. (1955) 93 C.L.R. 435.
3. ibid., at p. 444.