Final answer:
The main problem with the claim is vagueness, as it lacks specificity in terms of how much longer the steak should be cooked.
Step-by-step explanation:
The main problem with the claim, "Please cook this steak longer. It's too rare," is vagueness. The statement lacks specificity, as it does not provide clear instructions on how much longer the steak should be cooked. Without a specific time or level of doneness, it is unclear how to satisfy the request.
In this case, the speaker could clarify the claim by providing a desired level of doneness, such as "Please cook this steak for an additional 2 minutes on each side." This would eliminate the ambiguity and provide clear instructions.
In summary, the issue with the claim is not ambiguity, but vagueness due to the lack of specific instructions.