Final answer:
The statement is false because Agile, not Waterfall, is more effective for projects with unclear requirements due to its adaptability and iterative approach.
Step-by-step explanation:
The statement that waterfall is more effective than agile for projects with unclear requirements is generally considered false. The Agile methodology is actually more suited for projects where requirements are likely to change or are not well-defined at the outset. Agile allows for iterative and incremental development, where the project can evolve as more information becomes available or requirements change. In contrast, the Waterfall model is more rigid and requires a clear definition of requirements from the beginning, as it follows a sequential design process where each phase must be completed before the next begins.