Sine qua non rule

A legal rule stating that a person’s conduct cannot be held to be the cause of a loss if the loss would have occurred anyway.
****
This rule says that a person’s conduct is not held to be the cause of a loss if the loss would have occurred anyway.

Single article limit

A limit the maximum an insurer will pay in respect of any one article which has been insured under a general description, e.g. personal possessions/belongings. A collective sum insured may not fully reflect the aggregate of the values at risk. The single article limit encourages the insured to insure high value items separately for appropriate amounts.