(1) the duty of expert witnesses is to furnish the court with the necessary scientific criteria for testing the accuracy of their conclusions, so as to enable the court to form its own independent judgment by the application of these criteria to the facts proved in evidence;
(2) scientific opinion evidence, if intelligible, convincing and tested, becomes a factor for consideration along with the whole of the other evidence in the case;
(3) the bare ipse dixit of a scientist/expert, however eminent, upon the issue in controversy, will normally carry little weight, for it cannot be tested by cross-examination nor independently appraised - [the parties having "invoked the decision of a judicial tribunal and not an oracular pronouncement by an expert"];
(4) the importance that the expert's reports identify the criteria by reference to which the court can test the quality of the expert's opinions;
(5) that examining the substance of an opinion cannot be done without the court knowing what are the essential integers underlying the opinion;
(6) the importance of the court being placed in a position to test the validity of the process by which an opinion has been formed so as to be in a position to adjudicate upon the value and cogency of the opinion evidence;
(7) the hallmarks of unreliable science and the not-so-qualified expert, being the inability to articulate the principal tenets that need to be understood, or to describe in ordinary language, the methods used and the reasons that point to a particular conclusion;
(8) the crucial significance of the expert revealing the whole of the manner in which the appropriate information utilised by the expert was dealt with in arriving at the formation of the expert's conclusions;
(9) that expert opinion evidence is to be judged like any other evidence: it must be comprehensible and reach conclusions that are rationally based; the process of inference that leads to the conclusions must be stated or revealed in a way that enables the conclusions to be tested and a judgment made about the reliability of them; and
(10) the intellectual basis of the opinion has to have been laid out.