Final answer:
The argument lacks a clear inference or evidence of reasoning, making it illogical. Adding a premise that establishes a clear and logical inference would make the argument stronger.
Step-by-step explanation:
The argument mentioned in the question lacks a clear inference or evidence of reasoning. An inference is the movement from premises to the conclusion, where the former provide support for the latter. The argument does not contain a clear inference as it is uncertain how we are supposed to cognitively move from the premises to the conclusion. Therefore, the additional premise that would most likely make the argument stronger is a premise that establishes a clear and logical inference between the premises and the conclusion.