The Second Argument: Whether It was Open to the Tribunal to Find the Link between the Events and Operational Service was "Too Remote and Too Tenuous"
51 This argument relied heavily on the Full Court's decision in Bull v Repatriation Commission (2001) 66 ALD 271; [2001] FCA 1832. It was submitted that, by using the phrase "too remote and too tenuous", the Tribunal misdirected itself because that characterisation, according to Bull, was reserved for hypotheses that were fanciful or irrational. The hypothesis at [61] of the Tribunal's reasons, it was submitted, could not be characterised in that way.
52 The applicant placed some emphasis on the similarity between the applicant's case and the factual circumstances in Bull. She relied in particular on the Full Court's reasons in Bull 66 ALD 271; [2001] FCA 1832 at [40] where, having set out what the material disclosed about the veteran's drinking habits in that case, Emmett and Allsop JJ stated:
the above is enough to disclose that on the material available it could hardly be denied that an hypothesis of the kind referred to … above was by no means fanciful or impossible or incredible or untenable. He drank lightly before the war, experienced stress in the war, spoke in guarded and repressed terms of the war and drank more heavily after the war. It could hardly rationally be said that an hypothesis that the increased drinking habits were brought about by his associations in the war or were to cope with his experiences in the war was fanciful or tenuous, etc. People who experience stress sometimes cope by consumption of alcohol.
53 In effect, the applicant submitted that, given the factual similarities with Mrs Forrester's claim about her husband's drinking, this passage established that the hypothesis put forward on behalf of Mrs Forrester was not capable of being characterised as "too remote" or "tenuous".
54 The respondent pointed out that the paragraphs of the Court's reasons in Bull that followed (66 ALD 271; [2001] FCA 1832 at [41]-[46]), read with what the Court earlier set out of the Tribunal's reasons in that case (at [27]), reveals that the Full Court accepted these were very much factual questions for the Tribunal and that they did not give rise to a question of law.
55 That submission could have force but, once again, the brevity of the Tribunal's reasons in Mrs Forrester's case undermines the strength of the respondent's argument. Unlike the Tribunal's reasons in Bull, the Tribunal in Mrs Forrester's claim did not articulate other explanations for an increase in the veteran's drinking. If it had done so, that would have been the end of this ground. The absence of explanation requires further inquiry into why the Tribunal characterised the link as too remote and too tenuous.
56 If it is apparent from a tribunal's reasons that in applying a provision or aspect of a statutory scheme (here, s 120(3) as construed in Deledio) the tribunal has misunderstood the question posed by the provision, then this error is jurisdictional: Kirk v Industrial Court of New South Wales (2010) 239 CLR 531 at 574. Whatever the differences might be between the constitutional review jurisdiction and a statutory jurisdiction to appeal on questions of law (as to which see McHugh and Gummow JJ in Re Minister for Immigration and Multicultural Affairs; Ex parte Applicant S20/2002 (2003) 77 ALJR 1165; [2003] HCA 30 at [58]), an error of this nature will invalidate a decision in either setting. Although not as precisely expressed as it may be, I accept that this is the intent of question of law 2 in the amended Notice of Appeal, as developed in argument on behalf of the applicant. The applicant submitted the Tribunal misunderstood the operation of s 120(3) because it rejected a hypothesis that was rational, using the phrase "too remote and too tenuous" in a way not justified by s 120(3), properly construed.
57 Despite the absence of a detailed explanation for the finding at [69], I find that, when read in the context of the whole of its reasons, paragraph [69] does not disclose a misunderstanding of s 120(3). An examination of the evidence and material relied on by the Tribunal and set out at [4] to [43] of its reasons reveals contradictory material about Mr Forrester's drinking habits, about what caused him stress before, during and after the war. The evidence and material there referred to also reveals Mr Forrester's history of anxiety, problems with his weight, and his anger about some of the positions and tasks he was assigned while he was in the army.
58 For example, the Tribunal records:
a. At [38], that a consultant psychiatrist Mr Forrester saw in 1996 reported that alcohol did not present as a clinical problem;
b. At [36], that in October 1973 an army medical history sheet reports Mr Forrester as consuming 12 cans of beer per week;
c. At [10], Mrs Forrester's evidence was that on his return from Vietnam she regarded her husband as a heavy drinker when that had not been the case before he went to Vietnam. Her evidence was that Mr Forrester was drinking six cans (375ml) during the week and another six over the weekend;
d. At [41], Mr Forrester's own evidence to the Board was that soon after his discharge he was drinking heavily, then abstained for 12 months, then returned to social drinking;
e. At [9], Mrs Forrester's evidence that prior to Vietnam Mr Forrester suffered a lot of anxiety;
f. At [18], Mr Forrester's son-in-law Mr Swan's evidence that Mr Forrester had told him he was greatly distressed by having to pack away the personal effects of dead soldiers and having to write to their families;
g. At [34], that his job performance records from the army showed variable levels of performance, some levels of anxiety and dissatisfaction, and at [35] that his medical reports in 1967 concluded Mr Forrester showed a very low tolerance for stress; and
h. At [40], that a consultant psychiatrist who examined Mr Forrester concluded in 1997 that Mr Forrester had a long history of anxiety disorder.
59 This list is not exhaustive. What it reveals is the Tribunal's identification of some evidence that might satisfy s 120(3) as explained in Deledio, and some that might not, as well as evidence that could positively suggest the material did not support the asserted hypothesis.
60 The terms "too tenuous" or "remote" are orthodox terms to use in this context: see East 16 FCR 517 at 532; Bushell 175 CLR 408 at 414; Byrnes 177 CLR 564 at 570. In my opinion, these terms are not synonymous with irrationality, but rather suggest a different problem with a causal link between war service and the veteran's death. The notion of "remoteness" is a key concept in causation analysis: see Cattanach v Melchior (2003) 215 CLR 1 at [179] per Kirby J.
61 Further, even if those descriptions could not be applied to the hypothesis put forward by Mrs Forrester, as the Full Court pointed out in Bull 66 ALD 271; [2001] FCA 1832 at [18], it does not necessarily follow that the asserted hypothesis is a reasonable one:
It is important to understand the following about East. The court said that an hypothesis is not reasonable if it is obviously fanciful or impossible or incredible or not tenable or too remote or too tenuous. However, the Full Court did not say that if an hypothesis was not obviously fanciful or not impossible, or not incredible or tenable or not too remote or not too tenuous, it was therefore necessarily reasonable. The material must point to the connecting hypothesis …
62 There is nothing in the Full Court's decision in Bull that assists the applicant's argument. The Full Court (at [22], citing Bey 79 FCR 364 at 373 and Repatriation Commission v Owens (1996) 70 ALJR 904) made it clear a factual exercise was involved:
The formation of the opinion called for by s 120(3) involves an assessment of the factual material before it. It involves reaching an opinion about a factual matter. It is, in that sense, a question of fact …
63 At [23] the Full Court in Bull also referred to a large number of authorities dealing with the proposition to which I have referred less fulsomely at [48] above. Again, minds may reasonably differ on whether a hypothesis is too remote or tenuous.
64 In Bull the Full Court concluded (66 ALD 271;[2001] FCA 1832 at [46]) that Gyles J had been correct to determine that the Tribunal was permitted to reach the view that the material before it did not point to a hypothesis connecting war service and service drinking, and so war service and death. Any error, the Full Court held, was an error of fact. This is despite what the Full Court had said at [40], the passage relied on by the applicant.
65 It is important to recall that the hypothesis in Mr Forrester's case sought to link, in whole or in part, five particular events in Vietnam with the change in Mr Forrester's drinking habits. That is why [40] of Bull, even if it could be taken as some kind of general endorsement for the purposes of s 120(3) of hypotheses of the kind with which it deals (and I do not consider it could be so taken), does not assist the resolution of the question of law in the present case. In the present case, what the Tribunal was saying at [69] was too remote or tenuous was, in its own words, the link between "the particular events of operational service" relied on by the applicant, and Mr Forrester's alcohol consumption and hypertension. That conclusion was open to it and no misunderstanding of s 120(3) is disclosed by that conclusion.