Final answer:
The statement may be true or false, but the provided information highlights that snow accumulation is a sufficient condition for school closure, not a necessary one. Other reasons may result in school closures as well, proving that school closure does not necessarily indicate that it snowed more than three inches.
Step-by-step explanation:
The statement 'School is not canceled for bad weather unless there is snow accumulation' can be true or false depending on the specific policies of the school district. However, if we refer to the information provided, such as, 'If it snows more than three inches, the schools are mandated to close,' we can infer that snow accumulation beyond a certain point (in this case, three inches) is a sufficient but not necessary condition for school closure.
It's important to note that schools might close for various other reasons, such as power outages or other extreme weather events. Thus, the presence of a necessary condition (school closure) does not inevitably verify that the sufficiency condition (more than three inches of snow) has occurred. This is an example of an invalid deductive inference known as affirming the consequent, which is a logical fallacy.
Schools were closed all over the United States and all over the world. Some schools are still closed for reasons that can be unrelated to snow accumulation, further illustrating the point that a school closure does not confirm a specific cause.