Logical Evaluation

When a compound expression is evaluated, the evaluation proceeds from left to right and as soon as the result of the outcome is assured, evaluation stops. Namely, in the case of an "AND" evaluation, when one of the terms evaluates to "false", evaluation is discontinued because additional true terms cannot make the result ever become "true". In the case of an "OR" evaluation, if any of the terms is found to be "true", evaluation stops because it will be impossible for additional terms to cause the result to be "false". In the case of additionally nested terms,
the above rules will be applied to each of the nested levels.