(c) cause or result in undue waste of time"
5 The expression "probative value", used in section 135, is defined in the dictionary to the Act as follows:
"Probative value of evidence means the extent to which the evidence could rationally affect the assessment of the probability of the existence of a fact in issue."
6 It is important to note that the word "opinion" is not defined in the Act. In an address delivered in February 1999 [(1999) 18 Australian By Review 1 to 2], Heydon QC [now Heydon JA] identified several decisions of the Federal Court which applied the common law definition as stated by Wigmore:
"… an inference from observed and communicable data"
[see for example Lindgren J. in Allstate Life Insurance Company v Australia and New Zealand Banking Group Limited (No 5 ) (1996) 64 FCR 73; (No 32) (at FCR 75).
7 Allstate relevantly concerned reliance evidence that had the witness known of certain facts (which had not been known at the time - which non disclosure formed the basis of a Trade Practices Act section 52 count), the witness would not have acted in a particular way. Allstate [No 5] involved the admissibility of a statement by an employee of Colonial Management Associates Inc. He had recommended that certain funds managed by Colonial be invested in debentures owned by Linter Textile. The Court admitted evidence that had the witness known that it was intended that Linter Textiles was to give certain guarantees to banks, he would not have given the recommendation.
8 The point about the admission of this statement into evidence is Lindgren J's holding that it was not 'opinion' evidence. It was rather 'direct' evidence from the person uniquely placed to give it of what that person would have done in a hypothetical situation. As Heydon QC pointed out:
"[Lindgren J.] admitted the evidence….. He said that the aversion of the common law to evidence of opinion is based on the concern of the common law to receive the most reliable evidence. Reliance evidence of the type under consideration was reliable in the sense that where the issue is what a person would have done in a situation different from that which actually occurred, the person in question is better qualified than all others to give evidence on the matter."
9 Three cases which applied the common law definition of "opinion evidence" are Hughes Aircraft Systems International v Air Services Australia (1997) 80 FCR 276; Guide Dog Owners and Friends Association vs Guide Dog Association of New South Wales (1998) 154 ALR 527 and Quick v Stoland Pty Ltd (1998) 157 ALR 615 at 617 per Branson J.
10 In Guide Dog Owners Sackville J. made the point that:
"As the Law Reform Commission acknowledged, the distinction between evidence of fact and evidence of opinion is often artificial, albeit one that is unavoidable: ALRC 26, Vol 1, paragraph 738"
11 The Australian Law Reform Commission gave this explanation for the proposal which led to the enactment of section 78 [Law Reform Commission, Evidence (Report No 26, 1985) paragraphs 739-740]:
"739. Exception-Lay Opinion Evidence .
At present lay opinion evidence is conventionally said to be inadmissible unless it fits within an apparently anomalous miscellany of "exceptions". The main factors that these share are that they can be said to be short hand expressions of fact based on the witness perceptions and that it has been seen by the courts as convenient to allow the expression of opinion in their case rather than to insist upon a lengthy, and possibly not particularly helpful, recitation of facts. The ultimate criterion for admission of opinion evidence should be whether it will assist the trier of fact in understanding the testimony, or determining a fact in the issue . To be of the requisite assistance, the lay opinion evidence must be based on the witness' personal perception of a matter or event. Against the admission of such evidence must be balanced time and cost factors, the danger of the evidence misleading or confusing the tribunal of fact and the possibility of being more prejudicial than probative . Thus, it is proposed to admit lay opinion testimony where it is based upon the personal perception of the witness and it is necessary to obtain an adequate account of his perceptions .
740.
The proposal, therefore, revives the original rationale based on the distinction between opinion based on the witness' perception and mere uninformed speculation. Consideration was given to including the express requirement that the opinion be rationally based. Arguably, however, this is the way the clause would be interpreted. If it is not, the second requirement - that it be necessary to obtain an adequate account of the witness' perception of the relevant event - should provide sufficient protection. It has been suggested to the Commission that the Canadian Task Force provision be followed-that the test be that the giving of evidence of opinion "be helpful either to the eyewitness in giving a clear statement or to the trier of fact in determining an issue". It is thought, though, that the standard of "helpfulness" is too low. It is important that witnesses give evidence as closely connected to their original perception as is possible to minimise inaccuracy and encourage honesty. In addition, the term "helpful" said such a low threshold and is so flexible that it would be impossible for appellate courts to exercise any real control over the exercise of the power"
[footnotes omitted] [emphasis added]
12 In Guide Dog Owners Sackville J expressed the view with which I agree, that the above passage suggests that section 78 should not be given a narrow meaning, founded as it is on the distinction between opinion based on the witness' perception and "mere uninformed speculation". His Honour also observed that although the few authorities on the scope of the section were consistent with this view, they had not been slow to invoke the exclusionary rules or powers contained in the Act.
13 The judgment of Sackville J. in Guide Dog Owners continues at 531 as follows:
"The following propositions appear to have been adopted in relation to section 78:
(1) Section 78 is concerned only with the non-application of the opinion rule. If evidence cannot be characterised as opinion evidence, neither section 76 nor section 78 of the Act applies: All State Life Insurance Co v Australian & New Zealand Banking Group Limited (No 32) (1996) 64 FCR 73 at 75; Hughes Aircraft Systems International v Airservices Australia (No 3) (1998) ATPR 41-612 (Federal Court, Finn J) at 40, 712-40, 713 (a case in which the exclusionary power in section 135 of the Act was exercised)
(2) Section 78 substantially alters the common law, by permitting lay opinion to be given by a person whose opinion is based on what the person saw, heard or otherwise perceived about a matter or event. While lay opinion evidence was admissible in certain classes of cases under the common law (see Cross on Evidence (5th Australian edition, 1996) para 29090), section 78 expands the scope for such evidence: R v Panetta (CCA (NSW), 2 October 1997, unreported), at 4, per Hunt CJ at CL