Final Answer:
Exactly one person gets out between A and B.
Step-by-step explanation:
The statement implies that either person A or person B will exit, but not both. This scenario of a single person leaving between two individuals often arises in sequential situations. For instance, if there's a queue or a narrow passage, only one person at a time can pass through or leave.
The phrasing "exactly one person" excludes the possibility of both A and B exiting simultaneously. This could apply to various scenarios, such as leaving a room through a single door or taking turns in a sequential process, ensuring only one person moves ahead at a time.
It's important to interpret the context to understand the situation fully. In this case, the emphasis on the exclusivity of one person departing between A and B points to a scenario where only one individual from this specific pair can exit at a given time, maintaining a sequence or a condition that allows for singular movement.