Final answer:
The passage (12) gives a clear example of how the glasses can be used in a regular educational setting, thereby providing valid reasoning for the glasses' everyday application by demonstrating their utility in common daily activities like studying.
Step-by-step explanation:
The detail that provides valid reasoning to support the author's idea that the glasses have an everyday application is found in passage (12). This passage states, "For example, he said, students can use the glasses while studying or doing schoolwork, helping them stay focused on the task and training them to control their attention." This example showcases how the glasses can be utilized in a common educational setting, which aligns well with the concept of everyday use, emphasizing their potential to assist in daily activities such as studying and time spent on schoolwork.