substantial factor

noun

Legal Definition of substantial factor

: an important or significant factor that is not necessarily the only factor leading to a plaintiff's injury but is sufficient to have caused the injury by itself — compare but-for

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“Substantial factor.” Merriam-Webster.com Legal Dictionary, Merriam-Webster, https://www.merriam-webster.com/legal/substantial%20factor. Accessed 26 Nov. 2020.

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