1.2 Ground 2 - unreasonable finding
25 In ground 2 the appellant contends that the primary judge fell into error in concluding that it was open to the Tribunal to find that the appellant's mother and stepfather were not involved with the LTTE because they were released from incarceration by the authorities in November 2009.
26 As stated in BSJ16 v Minister for Immigration and Border Protection [2017] FCAFC 78 at [40], [41] (per Collier, Murphy and Burley JJ):
It is settled that even wide discretions must be exercised judicially, according to rules of reason and justice, and not arbitrarily or capriciously: Starke J in House v The King (1936) 55 CLR 499 at 503, Crennan and Bell JJ in Minister for Immigration v SZMDS (2010) 240 CLR 611 at [121]. To that extent, "illogicality" or "irrationality" in administrative reasoning sufficient to give rise to jurisdictional error means that the decision is one at which no rational or logical decision maker could have arrived on the same evidence: SZMDS 240 CLR 611 at [130]. As Crennan and Bell JJ further observed in SZMDS 240 CLR 611:
131. … But, the test for illogicality or irrationality must be to ask whether logical or rational or reasonable minds might adopt different reasoning or might differ in any decision or finding to be made on evidence upon which the decision is based. If probative evidence can give rise to different processes of reasoning and if logical or rational or reasonable minds might differ in respect of the conclusions to be drawn from that evidence, a decision cannot be said by a reviewing court to be illogical or irrational or unreasonable, simply because one conclusion has been preferred to another possible conclusion.
It is also settled that the legislature is taken to intend that a discretionary power, statutorily conferred, will be exercised reasonably. Minister for Immigration and Citizenship v Li (2013) 249 CLR 332 (at [63] per Hayne, Kiefel and Bell JJ, at [26]-[28] per French CJ and at [88]-[92] per Gageler J). As French CJ observed in that case (at [30]) a distinction may arguably be drawn between rationality and reasonableness, as not every rational decision is reasonable. In broad summary, legal unreasonableness may include a conclusion reached by a supervising court after the identification of an underlying jurisdictional error in the decision-making process, or a conclusion that the decision is arbitrary, capricious or without "common sense" or lacks an evident and intelligible justification: Li 249 CLR 332 at [28], [76], [105]; Minister for Immigration and Border Protection v Singh (2014) 231 FCR 437 at [44].
27 As I have noted above, the Tribunal reasoned that the fact that the appellant's mother and stepfather had been in a relief village and were then released from it tended to show that they had not been involved in the LTTE. The Tribunal cited country information dealing with mass detention of Tamils after the end of the war, and the process of screening people so detained to identify LTTE members and their supporters. In evidence before the Tribunal (and the primary judge) was a document which indicated that the mother and stepfather were in a relief village.
28 It was not irrational or illogical for the Tribunal to consider the evidence submitted by the appellant which suggested that both his mother and stepfather had been in a relief village, regarded as displaced persons and released, and draw upon country information to determine that a decision had been made that they were not involved in the LTTE. Plainly, the screening processes used by the authorities have some bearing on the likelihood that, at least at the time of their release, they were not regarded with suspicion. The question of the weight to be given to such a consideration is a matter for the decision maker. I see no error on the part of the learned primary judge in rejecting this ground of appeal.