Prevents absurd results - provides fairness - Re Sigsworth, judge prevented D from inheriting
Respects parliamentary supremecy - narrow approach, using meanings - R v Allen, chose between two.
Saves time - no need to change the law - R v Allen, courts applied most suitable definition.
Narrow Approach respects rule of law - predictability - Maddox v Storer, chose meaning that upheld certainty of law.