The Credit Findings
9 The Tribunal rejected the Appellant's central claim that she had been detained and questioned at Colombo Airport on return to Sri Lanka from Norway in April 2014. It did so on the basis of a number of credibility concerns. The Appellant took issue with four of the concerns identified by the Tribunal. The first concern was identified at [41]-[50] of the Tribunal's reasons. Paragraph [41] is as follows:
Firstly, it is not credible that authorities would have had the opportunity to undertake the complex investigations that would have been required to implicate the applicant in relation to activities occurring many years before. That is in the context of the applicant claiming that authorities first took an interest in her in early 2014 as a result of her interaction with [R] in Norway at that time.
10 It is not necessary to explain the backstory to this paragraph because the nature of the Appellant's submission does not require it. The submission is that the Tribunal made the unwarranted assumption that the persons conducting the interview were telling the truth. It was true that if the interrogation of the Appellant involved putting to her a series of propositions about her antecedent history which her interrogators believed to be true then the Tribunal's reasoning made sense. However, it was just as possible that the interrogators were putting a series of false propositions to her to see what information they could dislodge from her. If that were the case then the Tribunal's reasoning would be unsound because it would not have been necessary to conduct the complex investigations to which the Tribunal referred as the interrogation was, in a sense, a work of fiction.
11 I agree that this is certainly an alternate hypothesis consistent with the facts examined by the Tribunal and inconsistent with its arc of reasoning. I would also accept that there are some circumstances where the existence of a reasonable alternate hypothesis can have forensic significance even without evidence. Thus in criminal cases that turn on circumstantial evidence, an accused person is entitled to an acquittal if there is a reasonable hypothesis consistent with their innocence: see, e.g., Peacock v The King (1911) 13 CLR 619 at 630, 634 per Griffith CJ; Barca v The Queen (1975) 133 CLR 82 at 104 per Gibbs, Stephen and Mason JJ; R v Baden-Clay [2016] HCA 35; 258 CLR 308 at [46] per French CJ, Kiefel, Bell, Keane and Gordon JJ. However, that is not the present domain of discourse. The question here, rather, is whether the Tribunal made an unwarranted assumption which, as I have explained above, devolves to inquiring as to whether the assumption was one which could reasonably be made (or which had an evident or intelligible justification).
12 The availability of a reasonable alternative hypothesis does not, on its own, demonstrate that the assumption made by the Tribunal was unwarranted in the sense of being unreasonable. As the cases to which I have referred show, something more is required. The Appellant has not shown, for example, that the weight of evidence overwhelmingly supported her preferred hypothesis or that the assumption made by the Tribunal had at its foundation a false premise. In these circumstances, I do not think that it was unreasonable for the Tribunal to proceed on the basis that the interrogators were posing questions about real events. This is particularly so where the Appellant did not advance a case to the Tribunal that the interrogation had involved putting fictional events to her. I therefore reject the challenge to the first credibility concern.
13 The second credibility concern was dealt with at [51]-[55] of the Tribunal's reasons. At [51] the Tribunal said this:
Secondly, notwithstanding claims that the applicant was told that there was evidence implicating her, including evidence of witnesses, no details of the substance of such evidence was presented to the applicant. This is not credible to the Tribunal, if there was incriminating evidence. Further, there was equivocation in the applicant's evidence as to whether she was questioned at the Boosa camp. The explanation given by the applicant in the hearing as to why the details of incriminating evidence were not put to her was unlikely, in the Tribunal's view.
14 The Appellant submitted that this reasoning was blighted by the same unwarranted assumption. For the reasons just given I reject this submission.
15 The third credibility concern was dealt with by the Tribunal at [56]-[62] of its reasons and concerned the Tribunal's refusal to accept that the Appellant's husband would have been able to bribe officials to secure the release of his wife. The Tribunal's reasoning on this appears sufficiently from [56], [59] and [62] of its reasons:
56. Thirdly, the claim by the applicant that she was released through the payment of a bribe and then told that she should leave the country and never return defies credibility, in light of allegations that the applicant was supporting LTTE separatism.
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59. The Tribunal does not discount the prospect of individuals detained in Sri Lanka being released through bribery. Independent evidence has been provided by the applicant supporting this. However, the Tribunal had some difficulty accepting that this would occur in relation to an individual who is accused of being an active separatist, given that this is the key concern of the Sri Lankan government. The Tribunal has even more difficulty in accepting that such an individual would be told to leave the country and not return. That is particularly the case in relation to the applicant because the allegations against her are due to her links with [R], a proscribed person, and an allegation that the applicant herself is engaged in separatist activities amongst the Tamil diaspora.
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62. The Tribunal considers that the scenario put forward by the applicant that she was told to leave the country lacks inherent credibility.
16 The Appellant submitted that this reasoning suffered from an unwarranted assumption. The unwarranted assumption was that individuals who were detained could not secure their release through a bribe and then be told to leave Sri Lanka and not come back.
17 The Tribunal was certainly aware that persons detained in Sri Lanka could in some circumstances bribe their way to liberty as [59] of the Tribunal's reasons makes clear. However, it explained why it did not think that notion could be applied to the position of the Appellant who was being accused of being an active separatist. There was also evidence before the Tribunal that some persons who secured their liberty through bribery subsequently left Sri Lanka. For example, the Tribunal had before it a report dated March 2014 prepared by Yasmin Sooka of The Bar Human Rights Committee of England and Wales and The International Truth & Justice Project, Sri Lanka entitled An Unfinished War: Torture and Sexual Violence in Sri Lanka 2009-2014. At p 7 of that report this passage appears:
Witnesses were released from detention only after their family paid bribes to members of the security force, often through intermediaries from pro-government paramilitary groups. Those who exited the country through Colombo airport also paid bribes to avoid being stopped and questioned.
18 I do not think that the Tribunal assumed that detained persons could not secure their release by bribery. Rather, it examined evidence to the contrary and concluded that it did not apply for an articulated reason. I do not think it is correct, therefore, to say that the Tribunal made an assumption about this. Nor do I think that it assumed that persons who secured their release by bribery could not be asked to leave Sri Lanka and not return. Rather, what it found was that given that the Appellant was accused of being an active separatist, it was unlikely that she would be asked to leave the country and not return. The reason for this was stated in the last sentence of [59], namely, that the Appellant was accused of engaging in separatist activities amongst the Tamil diaspora.
19 I do not think that it can be said that this reasoning lacked an evident or intelligible basis or that it could not reasonably be arrived at.
20 To the extent that the Appellant maintains her submission that the reasoning underpinning this concern was blighted by the same unwarranted assumption as the first two credibility concerns, such that the Sri Lankan authorities in fact did not believe her to be an active separatist and could therefore plausibly have allowed her release to be secured through bribery, I reject this submission for the same reasons given above.
21 The Appellant next submitted that the Tribunal's fifth reason for disbelieving her revealed an unwarranted assumption (the Tribunal's fourth reason is subject to a separate challenge). This fifth reason is at [69]-[70] of the Tribunal's reasons. The finding at [69] was in these terms:
Fifthly, evidence by both applicants that the most recent passports of the applicant and the applicant husband were both returned to the applicant husband at the airport, before he left, is not credible in light of the allegations against the applicant. Given the nature of the allegations against the applicant, the Tribunal considers that her passport would have been retained during the process of detention and interrogation.
22 The Appellant submitted that the Tribunal did not have before it any evidence concerning country practices on which this finding might be based and there were three reasons which tended against it. Firstly, the CID did not make allegations against the husband so there was no reason for his passport to be retained. Secondly, if the CID was really concerned about her activities with the LTTE then it could have charged her at the end of the interrogation and continued to detain her. Thirdly, the Sri Lankan authorities had 'sophisticated … stop and watch databases'. Using these databases the authorities could stop a person (such as the Appellant) leaving Sri Lanka even if they had a passport. These three reasons provided the explanation for why the Appellant's passport was returned before she was released from detention.
23 It would appear that the unwarranted assumption is that, given that the allegation against the Appellant was that she was involved in separatist activities, it was unlikely that her passport would have been returned to her. I would accept that the Tribunal made this assumption and I also accept that there was no evidence before the Tribunal about the circumstances in which passports are kept or returned when a person is detained following an interview at the airport. However, not all assumptions are unwarranted. In this case, the Tribunal linked the making of the assumption to the nature of the allegation made against the Appellant. I do not think that in reasoning that way it may be said that the Tribunal acted unreasonably or that its assumption lacked an evident or intelligible justification.
24 As to three matters which were said to tend in the opposite direction, I accept that there does not appear to be any reason why the husband's passport would not have been returned to him. But assuming the Tribunal erred in that regard, this would have had no impact on its conclusion in relation to the return of her own passport where its reasoning would still apply. I accept that the CID could have charged the Appellant but I do not understand how this provides a reason why her passport would have been returned to her. In the same vein, whilst it is plausible that the existence of the stop and watch databases might explain why her passport was returned, I am unable to conclude that their existence made it unreasonable for the Tribunal to reason as it did.
25 I therefore reject the Appellant's case on each of the unwarranted assumptions. It is not necessary therefore to determine whether the Appellant had to succeed on all of them or whether, as she submitted, the findings were comingled such that success on one would undermine the others. For completeness, applying the standard in WAGO and BZD17 I would reach the same conclusion. In the case of each of the unwarranted assumptions set out above, I would conclude that the Tribunal did consider the question posed by the material before it.