Where a plaintiff relies on both misleading representations by a defendant and the plaintiff's own independently defective analysis in deciding to proceed with a venture, the plaintiff's independent and unreasonable conduct may be regarded as the sole cause of the loss on a common sense basis, even though the misleading conduct was an essential condition of the loss. The onus is on the plaintiff to prove the quantum of loss attributable to the misleading conduct by excluding losses caused by independent factors such as cost overruns and delays unrelated to the defendant's conduct.
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