Answer:
Yes, Thompson is correct in his claim to be a third party beneficiary of the Cannon-insurer contract.
Explanation:
A third party contract covers an individual or firm against a loss caused by some third-party.
An example is fire insurance that will indemnify Thompson (third party) with Cannon-insurer contract.
Since Cannon is the insured, he will investigate to be sure that the cause of the fire was worthy of indemnity. This is definitely why he is in agreement with the insurer.
The two main categories of third-party insurance are liability coverage and property damage coverage.