It is commonplace for insurance policies to include an exclusion for deliberate or wilful acts, or a condition precedent that an insured must exercise ‘all reasonable care’. Such clauses intend to incorporate into the policy a requirement for a certain standard of behaviour by the insured: failure to meet that standard renders the insured uninsured.

Two recent Supreme Court decisions from Victoria, Australia, and the United Kingdom have highlighted that the clauses will be construed in light of the commercial purpose of a policy, which presumes that foolish behaviour is intended to be insured. The facts of these cases are useful illustrations of this principle.