Define Grammatical Interpretation. What are the exceptions to grammatical interpretation?

Grammatical Interpretation and its exceptions: 'Grammatical interpretation' concerns itself exclusively with the verbal expression of the law, it does not go beyond the letter of the law. In all ordinary cases, 'grammatical interpretation' is the sole form allowable. The Court cannot take from or add to modify the letter of the law. This rule, however, is subject to some exceptions: (i) Where the letter of the law is logically defective on account of ambiguity, inconsistency or incompleteness. As regard the defect to ambiguity, the Court is under a duty to travel beyond the letter of the law so as to determine from the other sources the true intention of the legislature. In the case of the statutory expression being defective on account of inconsistency, the court must ascertain the spirit of the law. (ii) If the text leads to a result which is so unreasonable that it is self-evident that the legislature could not mean what it says, the court may resolve such impasse by inferring logically the intention of the legislature.