“A judge or a tribunal of fact should make findings of fact in relation to a matter before it if they can. In most cases, although in some it may be difficult, they can do just that. Having made them, the tribunal is entitled to draw inferences from the findings of primary fact where appropriate. In the exceptional case, however, a judge conscientiously seeking to decide the matter before him may be forced to say “I just do not know”: indeed to say anything else might be in breach of his judicial duty. In this connection, however, I would say this. Speaking from my own experience some people find it easier to make up their minds than others and it should not be thought that a swift reliance upon where the burden of proof lies and a failure to decide issues of fact in the case, ought in any way to be considered an easy or convenient refuge for anybody who does find it difficult to make up his mind in a particular case. Judges should, so far as is practicable and so far as itis in accordance with their conscientious duty, make findings of fact. But it is in the exceptional case that they may be forced to reach the conclusion that they do not know which side of the line the decision ought to be. In any event, where the ultimate decision can only be between two alternatives, for instance negligence or not, or, as in the instant appeal, dismissal or resignation, then when all the evidence in the case has been called the judge or the tribunal should ask himself or itself whether, on that totality of the evidence, on the balance of probabilities, drawing whatever inferences may be thought to be appropriate, the alternative which it is necessary for the plaintiff to succeed is made out. If it is not, then the operation of the principle of the burden of proof comes into play and the plaintiff fails.”
“46. From these authorities I derive the following propositions: (a) The situation in which the court finds itself before it can despatch a disputed issue by resort to the burden of proof has to be exceptional. (b) Nevertheless the issue does not have to be of any particular type. A legitimate state of agnosticism can logically arise following enquiry into any type of disputed issue. It may be more likely to arise following an enquiry into, for example, the identity of the aggressor in an unwitnessed fight; but it can arise even after an enquiry, aided by good experts, into, for example, the cause of the sinking of a ship. (c) The exceptional situation which entitles the court to resort to the burden of proof is that, notwithstanding that it has striven to do so, it cannot reasonably make a finding in relation to a disputed issue. (d) A court which resorts to the burden of proof must ensure that others can discern that it has striven to make a finding in relation to a disputed issue and can understand the reasons why it has concluded that it cannot do so. The parties must be able to discern the court's endeavour and to understand its reasons in order to be able to perceive why they have won and lost. An appellate court must also be able to do so because otherwise it will not be able to accept that the court below was in the exceptional situation of being entitled to resort to the burden of proof. (e) In a few cases the fact of the endeavour and the reasons for the conclusion will readily be inferred from the circumstances and so there will be no need for the court to demonstrate the endeavour and to explain the reasons in any detail in its judgment. In most cases, however, a more detailed demonstration and explanation in judgment will be necessary.”