Unreasonableness
34 The applicant claims that the Tribunal's decision was "unreasonable in the Eynesbury sense". This claim is largely unparticularised. To the extent that it is, the claim seems to concern the Tribunal's findings as to inconsistencies in the applicant's evidence and its rejection of his claim to be a target of the Awami League.
35 The first respondent agrees that "unreasonable in the Eynesbury sense" should be understood as a reference to the standard attributed to Associated Provincial Picture Houses Ltd v Wednesbury Corporation [1948] 1 KB 223.
36 The principles informing judicial review for unreasonableness in the legal sense were, more recently, summarised by the Full Court in Minister for Immigration and Border Protection v SZVFW [2017] FCAFC 33.
37 Those principles relevantly include that:
(1) There is a legal presumption that a statutory discretionary power must be exercised reasonably in the legal sense of that word.
(2) There is an area within which a decision-maker has a genuinely free discretion, which area is bounded by the standard of legal reasonableness.
(3) The standard of legal reasonableness does not involve a court substituting its view as to how a discretion should be exercised for that of a decision-maker.
(4) The legal standard of reasonableness is not limited to what is in effect an irrational, if not bizarre, decision and an inference of unreasonableness may in some cases be objectively drawn even where a particular error in reasoning cannot be identified.
(5) In determining whether in a particular case a statutory discretion has been exercised unreasonably in the legal sense, close attention must be given to the scope and purpose of the statutory provision which confers the discretion and other related provisions.
(6) Legal unreasonableness "is invariably fact dependent" and requires a careful evaluation of the evidence. The outcome of any particular case raising unreasonableness will depend upon an application of the relevant principles to the relevant circumstances, rather than by way of an analysis of factual similarities or differences between individual cases.
(7) The concept of legal unreasonableness can be "outcome focused", such as where there is no evident and intelligible justification for a decision or, alternatively, it can reflect the characterisation of an underlying jurisdictional error.
(8) Where reasons are provided, they will be the focal point for an assessment as to whether the decision is unreasonable in the legal sense and it would be a rare case to find that the exercise of a discretionary power is legally unreasonable where the reasons demonstrated a justification.
(Minister for Immigration and Border Protection v SZVFW [2017] FCAFC 33 at [37]-[39]; citing Minister for Immigration and Border Protection v Eden (2016) 240 FCR 158; Minister for Immigration and Citizenship v Li (2013) 249 CLR 332 (Li); Minister for Immigration and Border Protection v Stretton (2016) 237 FCR 1 (Stretton); and Minister for Immigration and Border Protection v Singh (2014) 231 FCR 437 (Singh))
38 Legal unreasonableness may encompass decisions that are arbitrary, capricious, without "common sense" or that lack an evident and intelligible justification: BSJ16 v Minister for Immigration and Border Protection [2017] FCAFC 78 at [41]; citing Li (2013) 249 CLR 332 at [28], [76], [105]; and Singh (2014) 231 FCR 437 at [44].
39 However, as Allsop CJ cautioned in Stretton [2016] FCAFC 11; 237 FCR 1 at [2]:
…it is unhelpful to approach the task [of identifying legal unreasonableness] by seeking to draw categorised differences between words and phrases such as arbitrary, capricious, illogical, irrational, unjust, and lacking evident or intelligent justification, as if each contained a definable body of meaning separate from the other.
These words and phrases express a rule that is directed to the limits of the exercise of power, and, because of that function, are necessarily expressed as abstractions applying to the infinite variety of decision-making under variously expressed statutory provisions, in a wide variety of legal contexts.
40 Ultimately, as Crennan and Bell JJ observed in Minister for Immigration and Citizenship v SZMDS (2010) 240 CLR 611 at [131]:
…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.
41 What all of these statements of principle make clear is that determination of legal unreasonableness is a fact- and context-dependent exercise, one which is difficult to accomplish in the absence of detailed particulars. In the circumstances, I am unable to identify any respect in which the decision of the Tribunal could be characterised as unreasonable, such that the primary judge's failure to identify the error would be appellable. To the contrary, the Tribunal's factual findings were plainly open on the evidence before it and it gave cogent reasons for not accepting the applicant's claims.