Answer:
Sunk costs have been or will be paid regardless of the decision whether or not to proceed with the project.
Explanation:
Sunk cost is a cost which has actually been incurred before and in no manner can be revoked or the cost cannot be recovered in any manner, whether to invest in a project or to stop a project, this cost will not affect the decision, as nothing can be done.
But this cost has actually been incurred.
Here in the statement it is provided that the cost will be paid which is not true, therefore the above statement is false, in this context.
Final Answer
Sunk costs have been or will be paid regardless of the decision whether or not to proceed with the project.