Argument I: This suggests that it is inappropriate to prevent individuals over 18, who have the legal capacity to vote, from enjoying themselves. This argument has merit as it highlights the inconsistency in allowing certain adult responsibilities and rights, like voting, while restricting personal enjoyment activities. Therefore, this argument is strong.
Argument II: This states that the entry fee to pubs should be increased. This argument does not directly address the age restriction issue but rather discusses a financial aspect of pub access. Thus, it does not contribute towards the core issue of the age-based disallowance. Hence, this argument is weak.
Argument III: This argues against restrictions based on the lack of similar restrictions in Western countries. This reasoning is weak as it relies on external standards rather than addressing the local context or implications of such a restriction.
Argument IV: This proposes the age restriction as a measure to prevent unhealthy habits among youngsters. While it touches on a potential benefit, it assumes without evidence that such restrictions would effectively prevent these habits. Therefore, it lacks direct support of the core issue and is considered a weak argument.
After evaluating all four arguments, only Argument I, which addresses the inconsistency in legal adulthood criteria, presents a strong case against the age restriction.