Final answer:
It is not plausible to believe Miles's explanation for being out on the lawn at midnight.
Step-by-step explanation:
Based on the given information, it is not plausible to believe Miles's explanation for being out on the lawn at midnight. The information provided in the question does not provide any context or evidence to support Miles's claim. To determine whether his explanation is plausible, more information would be needed, such as his previous behavior, actions, or other witnesses who can provide additional insight.