Substantial factor
Substantial factor - A factor substantially brings about a death, injury, disability, wound, condition, cardiac-event, heart attack, or stroke if -
(1) The factor alone was sufficient to have caused the death, injury, disability, wound, condition, cardiac-event, heart attack, or stroke; or
(2) No other factor (or combination of factors) contributed to the death, injury, disability, wound, condition, cardiac-event, heart attack, or stroke to so great a degree as it did.