The core of the defendant’s rebuttal is that discussions regarding the March cargo took place in the context of private negotiations instead of an open tender. John Driscoll opined in writing that the practice of the middleman offering back-to-back transactions only applies to open tender situations. For private negotiations, the buyer and refinery middleman “start from scratch” and “negotiate whether the bid is indicative or firm and tradeable, how long the bid is in effect, and other relevant commercial terms”. Private negotiations are “less transparent and more vulnerable to potential misunderstanding than public tenders” and will thus “require more clarity, definition and confirmation”. Therefore, he claims that when ISU was engaging in private negotiations with the defendant for a cargo that would be obtained from Hyundai Korea, the deal did not have to be done on a back-to-back basis, nor did ISU have to secure a firm bid from the defendant or submit a firm, tradeable bid to Hyundai Korea. But on the stand, John Driscoll invalidated his written evidence. When he was asked, under cross-examination, about ISU’s potential profit from the March cargo and whether that profit was a lot of money, he answered that, “as a trader this is a back-to-back deal intended to be riskless”, ie, riskless for ISU. When he was responding to a question, in his re-examination, as to why he placed greater emphasis on the Platts index in his report, he again stated that “this is a back-to-back deal”. These responses, as counsel for the claimant points out, were unprompted – they were not given in response to questions on whether the March cargo was to be sold on a back-to-back basis. His responses revealed that as a trader, he too considered it commercially unworkable for ISU to bear market risk as a refinery middleman in relation to the sale of the March cargo. This fortifies the claimant’s point that traders in the industry, including the defendant, would have known that ISU was selling the LCO cargo, including the March cargo, on a back-to-back basis.