This judgment from the Supreme Court of Queensland highlights important principles on the admissibility of expert evidence, relevant to common-law jurisdictions not just in Australia but around the world.
The hearing was one of many in a long-running legal dispute dating back to 2007, with $1.2 billion at stake. Two prominent figures in Australia’s mining industry, Chris Wallin and Ken Talbot, originally entered discussions to mine thermal coal near Monto, Queensland in 2001. Most of the capital was to come from Talbot’s company Macarthur Coal, which took a majority stake in the project and agreed to fund the first stage, which was expected to produce 500,000 to 1.5 million tonnes of coal. A potential second stage, if deemed viable, would increase production to 10 million tonnes.
A joint venture agreement was signed in 2002 but tensions arose later in the very same year. Despite having invested $20 million in the project Talbot acquired doubts regarding its profitability, citing concerns about the market demand for thermal coal as well as logistics of the site including the capacity of the railway to transport coal to the nearest port. In 2003 representatives of Macarthur made use of the company’s majority status to pass a motion to suspend all work on the Monto mines, and publicly announced an end to the project.
All credibility, all good conscience, all evidence of truth come only from the senses.”
Friedrich Nietzsche
Wallin, however, opposed Talbot’s abandonment of the project, and in 2005 successfully prevented Macarthur from selling half of its interests. 2007 saw an opening to legal proceedings with Wallin’s company Sanrus and the two other parties to the agreement bringing a claim against Macarthur for breach of contract. Sanrus sought compensation equivalent to the projected profits from the Monto coal and the eventual sale of its interests after successful development of the site. The dispute remains to be resolved, with the current value of the claim totalling $1.2 billion.
This particular hearing, Sanrus Pty Ltd & Ors v Monto Coal 2 Pty Ltd & Ors (No 8), was held in October 2019 in order to address objections raised by Sanrus (‘the plaintiffs’) regarding expert evidence adduced by Macarthur and related companies (‘the defendants’). The outcome of the overall proceedings was to hinge on the question of whether Macarthur had valid reasons for walking away from the project so soon after its inception, and hence expert witnesses were asked to present opinions on matters such as the quality of coal which would likely have been produced and the demand from utility companies in Asia.
The plaintiffs took issue with a large number of assertions from four different reports produced by the defendants’ expert witnesses. The plaintiffs’ many objections were categorised under four main headings: statements which were sufficiently vague on particulars as to be irrelevant; unacceptable opinions on the state of mind of hypothetical third parties; opinions which lacked statement of the underlying facts; the basis of witnesses’ knowledge not being identified.
Mr Justice Bond upheld only one of the plaintiffs’ categories of objection: that opinions provided without statement of the underlying facts were inadmissible. One of the defendants’ witnesses had presented opinions on the quality of coal being produced in four specific mines in 2004-5; drawing on the “assumption identification rule”, Bond J ruled that these opinions were inadmissible without explicit statement of the facts needed to justify such opinions.
As for the other grounds of objection, Bond J ruled that there was no reason to reject the evidence. Where expert witnesses opined on general topics such as the level of demand for coal in Taiwan and South Korea, it was deemed unnecessary for them to identify specific bases for their knowledge, as their “accumulated knowledge and experience” was sufficient. Bond J also permitted evidence which sought to predict the stance of hypothetical third parties; provided that the party is a generalised actor such as a power utility company in the coal market, these predictions are admissible, although they would not be if they pertained to specific individuals. Regarding the alleged vagueness of certain parts of the reports, the judge simply disagreed, ruling that the process of reasoning being employed was always clear.
On the whole this ruling affirms the significantly wide scope permitted to expert witnesses to present opinions to a court. A judge will usually accept a witness’ experience in their field as being sufficient for them to offer hypotheses on relevant matters. However, where an expert witness deals with more specific topics which call for analysis of facts, they should be careful to identify the evidence underlying their assertions.
Link: SUPREME COURT OF QUEENSLAND – Sanrus Pty Ltd v Monto Coal 2 Pty Ltd (No 8) [2019] QSC 255
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