(6) disregarding the consideration that unless the floor was wet there was no explanation for the plaintiff falling.
24 In my opinion none of these matters considered either individually or collectively makes out a case for overturning the decision of the primary judge.
25 Ms Aquilina did concede in cross-examination that it was possible she did not inspect the floor until after she returned with the chair, and indeed on this matter in cross-examination said "I don't recall". However in my opinion it was open to the primary judge to regard this as not any withdrawal of her evidence in chief that she was with the plaintiff for a few minutes after the fall and her evidence in chief that she inspected the floor immediately after the fall, but rather as merely something to be taken into account in assessing the weight of the evidence.
26 In relation to the second matter raised by Mr O'Dowd, in my opinion a fair reading of Ms Aquilina's evidence supports the view that she "waited for" Ms Cortis, and waited at least until Ms Cortis was on her way down, so that if Ms Cortis had not actually arrived when Ms Aquilina left, she was close and was approaching. In my opinion, on Ms Aquilina's evidence it was unlikely that there was a period of time when there was a realistic possibility that another employee, unidentified, might have come and wiped liquid from the floor.
27 On the third point, in my opinion the primary judge was entitled to give weight to Ms Plant's evidence that it was the younger of the two Woolworths employees who attended to the plaintiff who wiped liquid from the floor, and thereby exclude the possibility that the person who wiped the floor was an unidentified person who might have come from the bakery department. In my opinion it was open to the primary judge to draw a distinction between a uniform and an apron, and hold that there was no Woolworths employee who wore a white uniform.
28 In relation to the fourth matter, the distance from where the plaintiff sat on a chair with the ice pack to the place where she had fallen was small; and in my opinion it was open to the primary judge to hold that the wiping up of water from the ice pack was a matter that the plaintiff and Ms Plant had observed and thought indicated the wiping up of liquid on which the plaintiff had slipped.
29 In relation to the fifth matter, again in my opinion it was open to the primary judge to rely on the evidence of Ms Plant, which was to the effect that it was Ms Aquilina who wiped up the liquid, and to prefer that to what must be considered uncertain and unclear evidence of Ms Aquilina on this point.
30 The absence of express reference to the consideration that liquid on the floor would give an explanation for the plaintiff falling, whereas no other particular explanation was suggested, is not in my opinion an omission to refer to a consideration of such importance as would vitiate the judgment: Mifsud v Campbell (1991) 21 NSWLR 725.
31 For those reasons, in my opinion no error has been demonstrated in the reasoning of the primary judge that would justify the intervention of this Court.
32 This conclusion would be sufficient to require the dismissal of the appeal. However I will very briefly discuss the two other liability issues raised by the appeal, on the assumption that the plaintiff had been successful to establish that there was liquid on the floor.
33 First it was put that the primary judge erred in not finding the defendant negligent, because it didn't provide a non-slip floor in the area. The significance of this challenge is that if it were successful, it would overcome any causation problem. I accept that there was some material that might have supported a finding that a reasonable response to the risk of slipping by a reasonable person in the defendant's position would have been to install non-slip flooring in the area. However, in my opinion, in the absence of clear evidence directed to questions of cost, practicability, and advantages and disadvantages, it was open to the primary judge not to be satisfied of this, and in my opinion his reasons were apposite. When in such a case a primary judge makes a judgment as to reasonableness, an appeal court will intervene only if satisfied that that judgment was wrong, and I am not so satisfied.
34 On the question of causation, in my opinion cases such as Franklins Limited v Brown [2000] NSWCA 177, Drakos v Woolworths (South Australia) Limited (1991) 56 SASR 431, and Kocis v SE Dickens Pty Ltd t/as Coles New World Supermarket [1998] 3 VR 408 do not mean that, once a breach of duty is proved giving rise to a risk that a floor will become slippery, the plaintiff does not have to prove on the balance of probabilities that fulfilment of the duty would have prevented the accident. In my opinion, a contrary position at common law is indicated in cases such as Brady v Girvan Bros Pty Ltd (1986) 7 NSWLR 241, Rose v Abbey Orchard Property Investments Pty Ltd (1987) Aust Torts Report 80-121, Shoeys Pty Limited v Allan (1991) Aust Torts Report 81-104, and Woolworths Limited v Strong [2010] NSWCA 282. The question of causation is now dealt with by ss 5D and 5E of the Civil Liability Act 2002. Those provisions confirm that proof of causation of the nature I have indicated is a requisite for liability.
35 In this case, there was no evidence directly as to when any liquid might have got on the floor. It might have been possible to use the type of calculation suggested by Rose v Abbey Orchard to support a case of causation. It appears that was not done; but in any event, in my opinion, it was well open to the primary judge to regard the matters referred to in par [104] of his judgment as negativing any inference that might otherwise have arisen supporting causation.
36 For these reasons, in my opinion no error is shown in the primary judge's conclusion on causation.
37 As regards the limitation point, in my view it raises difficult questions, and it would be preferable for this Court not to embark on those questions in a case where a decision on them is not necessary, and would at best be obiter.
38 For those reasons, in my opinion the appeal should be dismissed with costs.
39 CAMPBELL JA: I agree. I would add that for counsel to obtain a concession from a witness that it is "possible" that there was a state of affairs to the contrary of the state of affairs that the witness had earlier deposed to is, by itself of very little persuasive value, given the very wide range of degrees of likelihood that are covered by the word "possible". That is in no way to detract from the significance on appeal of the trial judge's view of the effect of a witness' evidence, in deciding whether the Fox v Percy test for reversing a trial judge's factual finding is met.
40 YOUNG JA: I agree.
41 HODGSON JA: The order of the Court is: appeal dismissed with costs.
oOo