An unusual event is not presumed.

Explanation

Legal presumptions are built on ordinary experience — extraordinary events are not anticipated, and liability for them must be proved, not assumed.

Where this applies

• An extraordinary event shouldn't be presumed — the unusual is not the expected.
• Legal presumptions are based on what normally happens, not rare events.
• Liability for extraordinary events must be proved, not assumed.

See also

• 12.1.8 An argument drawn from things commonly happening is frequent in law.
• 12.7.1 A fortuitous event is not to be expected, and no one is bound to foresee it.