Complex sentence: The reasonable person is a legal fiction of the common law representing an objective standard against which any individual's conduct can be measured in order to determine if a breach of the standard of care has occurred, provided a duty of care can be proven.
Split into simpler sentences: The reasonable person is a legal fiction of the common law representing an objective standard against which any individual's conduct can be measured. It is used to determine if a breach of the standard of care has occurred, provided a duty of care can be proven.