One advantage of the view that causes and effects are facts is that it lets causation be iterated: it lets the fact that C causes E have its own causes and effects. To see how this can happen, recall that facts by definition correspond to true sentences, like 'Don falls' and 'Don dies'. So if causes and effects are facts, causation is rightly reported by causal instances of
entailing the facts C and E, e.g. that Don falls and that he dies, which (I) says are linked as cause to effect.