9 Turning to their application to the present case, the first objection raised as to whether Mr Epstein possesses the relevant additional or special qualification to comment on what prudent practitioners would have done. The objection is based on what was said by Hodgson CJ in Eq (as his Honour then was) in MB v Protective Commissioner (at [9]) as follows:
The third problem with this sort of evidence is that there can be a real question as to the qualification of the witness. In many cases, just the ordinary training and experience of a professional in the field would not be sufficient to justify admission of that person's opinion as to what a competent and careful professional would do in hypothetical circumstances. For that kind of opinion, I think one needs some additional and special qualification. In that respect also, I agree with what was said in O'Brien .
10 At present, the evidence of Mr Epstein's qualifications establishes only that he was admitted as a solicitor in 1978, was called to the Bar in 1982, was appointed Senior Counsel in 2000 and has practised extensively in contract law, real property, equity and trade practices. That does not of itself demonstrate that he has the relevant additional or special qualifications to comment on what prudent practitioners would have done or ought to have known. On the other hand, his standing as Senior Counsel and his experience in 32 years of practice together means that he has substantial experience, more extensive than the "ordinary" barrister. In the course of that practice, and having regard to the necessarily extensive interaction he must have had with other barristers in relevant fields of practice over the years, it is reasonable to infer that he has acquired knowledge of what other professionals do or would do in certain circumstances. In my view, the evidence does not presently sufficiently qualify him to express the opinions he has, but it would not take very much to overcome that hurdle, and if this be the only successful objection, I would grant leave to adduce supplementary evidence to qualify him in that respect.
11 The second ground of objection is based on what was said by Hodgson CJ in Eq in MB v Protective Commissioner in (at [8]) as follows:
Second, there may be a problem of lack of clarity as to the circumstances being addressed. If hypothetical circumstances are fully stated by the professional in the opinion, then it will be reasonably clear to what circumstances the opinion applies. However, if the witness merely says that, in the circumstances faced by the person whose conduct is in issue, a careful and competent professional would act in a certain way, there is a problem that those circumstances may be determined by the court differently from the circumstances which the witness had in mind. For that reason at least, I think evidence in that form should normally be rejected. Even if it were technically admissible it would, in my opinion, be unfair to give the other party the task of teasing out all the circumstances the witness had in mind, so that rejection under s 135 of the Evidence Act 1995 (NSW) would be justified.
12 It is true that, contrary to the guidance provided by that paragraph, Mr Epstein does no more than say that "in the circumstances faced by Mr Warren", a careful and competent professional would act in a certain way. He does not fully state the hypothetical circumstances involved. On the other hand, it is also to be borne in mind that Hodgson CJ indicated that such evidence would "normally" be rejected, it being implicit that rejection is not universally inevitable. In the present case, it is not apparent that any idiosyncrasies of Mr Warren's precise position or instructions would impact on the general expressions of opinion which I have described as being the essence of Mr Epstein's opinion. This is a case in which, as it seems to me, the absence of a full statement of the hypothetical circumstances on which Mr Epstein's opinion is based is not prejudicial to the third defendant, and I would not reject Mr Epstein's opinion on this ground.
13 I turn then to the objection that Mr Epstein's report does not sufficiently set out the basis and rationale for his opinion. Essentially, what Mr Epstein's report does is to commence from the judgments of Austin J and Bryson J, to find that those judgments convincingly demonstrate that a proposition believed to be essential to the Lucantonios' case against the vendor was fundamentally flawed, and to opine that a barrister would have recognised that from the outset and before the relevant judgments were given. The judgments of Austin and Bryson JJ were ex post facto in this case. What an expert would have to demonstrate was that there was current in the profession at the time of the conduct in question, knowledge, standard or practice applicable to the present circumstances. Mr Epstein does not descend to say, for example, that it was commonly discussed or acknowledged in the profession prior to those judgments that positions such as that adopted on behalf of the Lucantonios were untenable. He does not refer to any professional publications or judicial decisions, prior to those in this case, to demonstrate that that was so.
14 Apparently, his report proceeds on the basis that the reasoning adopted by Austin J and Bryson J ought to have been apparent at the outset to a barrister in Mr Warren's position. One difficulty with that approach is that the judgments of Austin J and Bryson J proceed on different bases. Austin J found that there was no serious question to be tried, having regard to clauses 6 and 7 of the Standard Conditions of Sale. Bryson J found that the DA plans were not unbuildable, and touched on Special Conditions 31 and 40 of the Contract for Sale. It is simply impossible to tell, from reading Mr Epstein's opinion, which particular line of argument he is opining should have been apparent to a barrister in Mr Warren's position. In my view, his opinion is no more than an ipse dixit disclosing no rationale whatsoever. It is no more than one barrister, albeit it be an experienced and senior one, commenting on the conduct of another. In my view, Mr Epstein's opinion adds nothing to what the Court could, on appropriate argument and facts, conclude itself. It does not meet the standard required of experts' reports by Makita v Sprowles.