A more thorough explanation:

A reasonable person is a legal standard used to determine liability in negligence cases. It refers to the behavior that a hypothetical person of ordinary prudence would exhibit in similar circumstances.

For example, if a driver is texting while driving and causes an accident, they may be liable for any injuries or damages caused. This is because a reasonable person would not engage in such behavior while driving.

The standard of a reasonable person is objective, meaning it is not based on the individual's subjective beliefs or experiences. In the case of Vaughn v. Menlove, a farmer was held liable for damages caused by a fire that started from a haystack he had piled near his neighbor's cabin. The court held him liable because a reasonable person would have known that such a pile of hay could cause a fire.

However, the standard of a reasonable person may vary depending on the circumstances. For example, a blind person would be held to the standard of a reasonable blind person, not a sighted person. Similarly, a child would be held to the standard of a reasonable child, not an adult.

Overall, the reasonable person standard is used to determine whether an individual's actions were reasonable and whether they should be held liable for any resulting harm.