题目选项分析

According to futuristic writings in the 1960s, robots would soon drastically reduce crime. With night vision and ability to detect the chemicals involved in ballistics, such robots could be programed to paralyze anyone roaming the street at night with a gun: virtually all criminals fit that description. These criminals would be incapacitated and thus unable to resist an easy arrest.

Which of the following, if true, most strongly indicates that the logic of the prediction is flawed?

【选项】Such robots would need to be charged during the daytime.