In a home insurance policy where the insurer's promise is to indemnify against 'loss or damage caused by fire' and a separate clause excludes fires started with the intention of causing damage by the insured or persons with consent, the exclusion operates as a specific exception to the insurer's promise. The insurer bears the onus of proving the exclusion applies; the insured need only prove loss or damage caused by fire. The test is whether the exclusion applies in all circumstances in which the promise applies (general qualification — insured bears onus) or only to a subset of those circumstances (specific exception — insurer bears onus).
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