AllTrue()

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

The AllTrue() extension method is used to determine whether all the boolean results are satisfied.

IEnumerable<BooleanResult<int, string>> results = 
    [
        new IsEvenProposition().Evaluate(6),
        new IsGreaterThanProposition(5).Evaluate(6)
    ];

results.AllTrue();  // true