Consideration of ground 1
51 It is an implied condition of the grant of almost any statutory power that it will be exercised reasonably, and an aspect of that requirement is that it be exercised rationally or logically, at least in the sense explained by Crennan and Bell JJ in Minister for Immigration and Citizenship v SZMDS [2010] HCA 16; (2010) 240 CLR 611 at [123]-[130]. It is not easy to establish that a decision maker has failed to observe those conditions: see Djokovic v Minister for Immigration, Citizenship, Migrant Services and Multicultural Affairs [2022] FCAFC 3; (2022) 289 FCR 21 at [33] (Allsop CJ, Besanko and O'Callaghan JJ). The Full Court in Djokovic described the task of the Court in such cases as follows (at [34]-[35]):
The task in assessing illogicality is not an exercise in logical dialectic. 'Not every lapse of logic will give rise to jurisdictional error. A Court should be slow, although not unwilling, to interfere in an appropriate case': [SZMDS] at 648 [130]. It is the ascertainment, through understanding the approach of the decision-maker and characterising the reasoning process, of whether the decision (or state of satisfaction) is so lacking a rational or logical foundation that the decision (or relevant state of satisfaction) was one that no rational or logical decision-maker could reach, such that it was not a decision (or state of satisfaction) contemplated by the provision in question. Some lack of logic present in reasoning may only explain why a mistake of fact had been made which can be seen to be an error made within jurisdiction. As the Chief Justice said in [Minister for Immigration and Border Protection v Stretton [2016] FCAFC 11; (2016) 237 FCR 1] at [11], the evaluation of whether a decision was made within lawful boundaries is not definitional, but one of characterisation and whether the decision was sufficiently lacking in rational foundation, having regard to the terms, scope and purpose of the statutory source of power, that it cannot be said to be within the range of possible lawful outcomes.
Ultimately, the question is whether the satisfaction of the relevant state of affairs or matter was irrational, illogical or not based on findings or inferences of fact supported by logical grounds: Minister for Immigration and Multicultural and Indigenous Affairs v SGLB [2004] HCA 32; 207 ALR 12 at 20-21 [38]; Re Minister for Immigration and Multicultural Affairs; Ex Parte Applicant S20/2002 [2003] HCA 30; 198 ALR 59 at 71 [52] and 98 [173], such that it cannot be said to be possible for the conclusion to be made or the satisfaction reached logically or rationally on the available material. It will then satisfy the characterisation of unjust, arbitrary or capricious.
52 The correct approach is to ask whether it was open to the Minister to 'engage in the process of reasoning in which [he] did engage and to make the findings [he] did make on the material before [him]': SZMDS at [133]. In that case, at [130], Crennan and Bell JJ comment that an allegation of illogicality or irrationality which provides a distinct basis for seeking judicial review of a decision as to a jurisdictional fact is 'an allegation of the same order as a complaint that a decision is … "unreasonable" in the sense that the state of satisfaction mandated by the statute imports a requirement that the opinion as to the state of satisfaction must be one that could be formed by a reasonable person'. A decision that is illogical in this sense will therefore be one that is unreasonable, as no reasonable person could have reached that decision on the same material.
53 In this case, the issue of Mr Ranson's ability to reoffend was crucial to the Minister's consideration of whether there was another reason why the cancellation of the visa should be revoked. The Minister was focussed on whether Mr Ranson represented an unacceptable risk to the Australian community. In view of the Minister's assessment of the crimes as being very serious, and as having caused serious physical and psychological damage to the victims, the Minister considered that any risk of reoffending was unacceptable. Plainly, he put significant weight on his assessment of the level of risk. His finding that Mr Ranson had shown limited remorse and insight into his offending dispensed with those matters as possible protective factors. So although the Minister acknowledged countervailing considerations, none were sufficient to displace the Minister's view that the risk of Mr Ranson reoffending meant that his visa should be cancelled.
54 With that in mind, the following observations about the approach and reasoning process of the Minister can be made:
(1) At paragraph 32 of the Minister's statement of reasons, set out above, the Minister gives a summary of Mr Ranson's physical and mental decline.
(2) At paragraph 33 the Minister acknowledges a representation that was based on Mr Ranson's 'health issues, dementia and the presence of full time supervision'.
(3) The Minister then, at paragraph 34, articulates quite fully his consideration of the significance of the full time supervision which Ms Ranson proposed she would provide. He explicitly finds that the denial of Mr Ranson's offending by family members, including Ms Ranson, reduces the protective factor of family support. But there is no articulation at all of the significance of the health issues and dementia, or their lack of significance, had that been the view of the Minister. So the view he took about that central point, Mr Ranson's physical and mental decline, is not stated, while his view about another related point, concerning the protective factor of family support, is.
(4) The relevant conclusion in paragraph 35 is only 'On balance I consider there remains a low risk that Mr [Ranson] will reoffend.' As this implicitly acknowledges, this is the same level of risk that the sentencing judge found in 2017.
(5) Under the heading 'Expectations of the Australian community' the Minister accepts that Mr Ranson will die soon. So it can be inferred that he did not disbelieve the evidence showing that his physical condition, at least, had deteriorated significantly. That is confirmed by the subsequent findings under the heading of 'Age and health' of the extent of Mr Ranson's infirmity and the Minister's acceptance of the significant hardship Mr Ranson will face on return to the United Kingdom.
(6) In his conclusion the Minister accepted that Mr Ranson's 'health issues and lack of supports in the United Kingdom' weighed significantly in favour of revocation. This further indicates acceptance of the extent and seriousness of Mr Ranson's health issues, but apparently in the context of impediments on return. The conclusion otherwise contains no reference to Mr Ranson's capacity to reoffend.
55 There is thus a gap in the Minister's logic. The Minister appears to have accepted that Mr Ranson has suffered a significant decline in his mental and physical abilities, and that he will die soon. And yet, the Minister has concluded that the risk that Mr Ranson will reoffend is the same as it was in 2017, when his physical and mental condition was much better and, on the materials before the Minister, the sentencing judge had described him as 'a fairly spritely man for almost 80'.
56 The argument put by the Minister, as summarised above, emphasised the proposition that a rational and reasonable decision maker could have come to the view that there remained a low risk of reoffending. But in my view, with respect, the argument fails at two points. First, showing that the outcome of the decision is one at which no rational and reasonable decision maker could have arrived does not exhaust the circumstances in which an administrative decision might transgress the implied condition that it be made rationally and reasonably. Chief Justice Kiefel and Bell, Gageler and Keane JJ encapsulated other circumstances, in relation to reasonableness, in ABT17 v Minister for Immigration and Border Protection [2020] HCA 34; (2020) 269 CLR 439 at [19] (quoting from Minister for Immigration and Citizenship v Li [2013] HCA 18; (2013) 249 CLR 332 at [91]; and Minister for Immigration and Ethnic Affairs v Teoh (1995) 183 CLR 273 at 290 respectively):
'[t]he implied condition of reasonableness is not confined to why a statutory decision is made; it extends to how a statutory decision is made' such that '[j]ust as a power is exercised in an improper manner if it is, upon the material before the decision-maker, a decision to which no reasonable person could come, so it is exercised in an improper manner if the decision-maker makes his or her decision in a manner so devoid of plausible justification that no reasonable person could have taken that course'.
57 It will be noted that the Full Court's encapsulation in Djokovic at [35] of the standard to be applied encompasses the process as much as the outcome: 'it cannot be said to be possible for the conclusion to be made or the satisfaction reached logically or rationally on the available material'. So here, if the decision of the Minister lacks plausible justification, the power under s 501CA(4) may not have been exercised properly.
58 The second point at which the Minister's argument fails is that where reasons are given for a decision, the plausible justification for the course of reasoning taken is to be found in those reasons. That appears from the following extract from Minister for Immigration and Border Protection v Singh [2014] FCAFC 1; (2014) 231 FCR 437 (Allsop CJ, Robertson and Mortimer JJ). After saying (at [46]) that the Minister in the appeal before them had put forward justifications for the decision under review which were not matters mentioned in the reasons for decision, their Honours said (at [47]):
This question highlights the distinctions made between reasonableness review which concentrates on the outcome of the exercise of power, and reasonableness review which concentrates on an examination of the reasoning process by which the decision-maker arrived at the exercise of power. Although it is not necessary for the purposes of this appeal to resolve the question whether those should be seen as two different kinds of review and what might flow from that, we are inclined to the opinion that, where there are reasons for the exercise of a power, it is those reasons to which a supervising court should look in order to understand why the power was exercised as it was. The 'intelligible justification' must lie within the reasons the decision-maker gave for the exercise of the power - at least, when a discretionary power is involved. That is because it is the decision-maker in whom parliament has reposed the choice, and it is the explanation given by the decision-maker for why the choice was made as it was which should inform review by a supervising court. It is not, as in House v The King (1936) 55 CLR 499, on an appeal from an exercise of a judicial discretion, for the court to re-exercise the discretion. If a supervising court goes outside the reasons given by a decision-maker for another justification for the exercise of power, that court might then be seen to be placing itself in the position of the repository of the power and therefore acting impermissibly. Where there are reasons, either the reasons given by the decision-maker demonstrate a justification or they do not. It would, we think, be a rare case where the reasons demonstrate a justification but the ultimate exercise of the power would be seen to be legally unreasonable.
59 While this view is expressed in terms of an inclination, the passage has been adopted and approved by subsequent Full Courts: Muggeridge v Minister for Immigration and Border Protection [2017] FCAFC 200; (2017) 255 FCR 81 at [57]; Vo v Minister for Home Affairs [2019] FCAFC 108; (2019) 269 FCR 566 at [43(2)]; CKL21 v Minister for Home Affairs [2022] FCAFC 70 at [64].
60 The difficulty for the Minister here is that he too finds himself in the position of supplying justifications for his decision now, before the Court, that are absent in his stated reasons themselves. As said in Singh, if the Court were to supply those justifications now, it would be acting in the position of the decision maker. That would not be permissible.
61 I therefore conclude that ground 1 is made out. While it is possible to speculate as to reasons why the Minister might have reached the view that Mr Ranson remained at low risk of reoffending, those reasons are absent from his actual decision. And the intelligible path of reasoning that is there - a lack of confidence in the protective factor of constant supervision by Ms Ranson because of her denial of her father's offending - is insufficient to justify the decision that was made. That is because it does not take account of Mr Ranson's underlying ability or inability to offend by reason of his mental and physical ailments, even without constant supervision.
62 That is not a mere lapse in logic that has led to an error of fact made within jurisdiction. It is a fundamental gap in the Minister's reasoning on a point that, in the context of his decision as a whole, was of crucial importance to the outcome. As a result, when viewed in light of the reasons actually given, the decision was illogical and unreasonable.
63 The Minister is not correct to characterise this as impermissible merits review. The authorities recognise that inquiry into error of this kind will inevitably be fact dependant: Singh at [42]; Minister for Immigration and Border Protection v SZVFW [2018] HCA 30; (2018) 264 CLR 541 at [84] (Nettle and Gordon JJ). But it is not an inquiry into whether the decision was right or wrong; it is an inquiry into whether, in exercising the statutory power, the Minister has dealt logically and reasonably with the materials that have enlivened that power. Ground 1 is upheld.