Final answer:
A court would most likely interpret the ambiguous clause in the fire insurance policy against Justice Insurance Company.
Step-by-step explanation:
In this case, where there is a dispute over the amount of liability under an ambiguous clause in a fire insurance policy, a court would most likely interpret the clause against Justice Insurance Company. This means that the court would interpret the clause in a way that is unfavorable to the insurance company.
By doing so, the court would protect the interests of the insured party, Isabel, and hold the insurance company responsible for a larger amount of liability.