Parties to any dispute who rely exclusively on opinions of experts without establishing the factual basis for those opinions do so at their peril.

The opinion of an expert must be based on facts that are established by the evidence. The court then assesses the opinions of experts on the basis of ‘whether and to

A corporation which operated two industrial sites found significant amounts of ground water contamination. Its attempt to get insurance cover on the basis that the pollution was sudden and accidental was unsuccessful because the evidence of its expert was rejected as not being based on sound methodology. The pollution exclusion therefore defeated the claim.

On