Answer: No, because of the integration clause
Step-by-step explanation:
Based on the information given, the buyer isn't correct as a result of the integration clause.
The integration clause, is a clause in a written contract that stipulates that a particular contract is complete and that the parties involved agreed to the contract and it's final.
This contract supersedes every other informal understandings and all other oral agreements relating as well. Therefore, the buyer is liable for the cost of the boat.