Decision not manifestly unreasonable or irrational
49 Counsel for the respondent submitted that, even if it were accepted that the Tribunal had done as it said and given the baptismal certificate some weight, the weight it gave it was so inadequate that the resulting decision displayed the kind of unreasonableness identified by Mason J in Peko-Wallsend. In other words, the weight given to the document was such that the decision was so unreasonable that no reasonable decision-maker could have reached it.
50 In my opinion, the better view is that, where the substance of an applicant's grievance is, as here, that the decision-maker has made a factual determination after giving inadequate consideration to some or all of the evidence before it, the proper review ground is the kind of irrationality identified in Applicant S20: see Santow JA's discussion in Greyhound Racing Authority (NSW) v Bragg [2003] NSWCA 388 at [58]-[59]. Perhaps this accounts for the way the notice of contention was framed.
51 As Crennan and Bell JJ recently observed in Minister for Immigration and Citizenship v SZMDS [2010] HCA 16 at [130], "not every lapse of logic will give rise to jurisdictional error". No matter how the ground of review is framed, if reasonable minds might differ in the result, the decision cannot be set aside for jurisdictional error as illogical, irrational or unreasonable merely because one conclusion has been preferred to another.
52 In this case I do not need to decide the proper review ground, or the standard to be met to make it out, as, in my opinion, the Tribunal's finding that the first respondent had not been baptised was not of this order. It was open to the Tribunal to conclude that he had not been baptised, notwithstanding his presentation of a certificate which, on its face, suggested otherwise. The first respondent had given inconsistent evidence on the subject and had demonstrated both a lack of knowledge about the Baptist Church and an extremely poor appreciation of the teachings of Christianity which the Tribunal was entitled to find was inconsistent with both his alleged exposure to the religion and his alleged exposure to the Bible. It is implicit in that finding that the statement in the certificate was as implausible as the first respondent's case. It should be remembered that the "certificate" purported to show that he had been baptised, not as an infant, but as a 15 year old.