AllFalse()

bool AllFalse<TMetadata>(this IEnumerable<BooleanResultBase<TMetadata>> results)

The AllFalse() extension method is used to determine whether all the boolean results are not satisfied.

IEnumerable<BooleanResult<int, string>> results = 
    [
        new IsEvenProposition().Evaluate(1),
        new IsGreaterThanProposition(5).Evaluate(1)
    ];

results.AllFalse();  // true