Analyzing the Argument and Assumptions

The question asks us to consider a given argument and determine which of the provided assumptions is implicitly taken for granted by the argument. An implicit assumption is something that is not stated directly but is understood to be true for the argument to be valid or make sense in its context.

Let's break down the argument and each assumption:

• Argument: Public smoking is an offence under the law.
• Assumption 1: Smoking is injurious to the health of the person who smokes.
• Assumption 2: Smoke is injurious even to others health in the public places.

Evaluating Assumption 1: Smoking and Personal Health

Assumption 1 states that smoking is harmful to the health of the smoker. While this is a widely accepted fact and often a reason for general anti-smoking campaigns, the argument specifically talks about smoking being an offence in public. A law making an action an offence in public usually relates to the impact of that action on other members of the public. If the sole concern of the law was the health of the smoker, the law would likely ban smoking everywhere, including private places, not just restrict it in public. Therefore, the argument that public smoking is an offence does not necessarily rely on the assumption that it harms the person smoking. The law's focus on the public aspect suggests a different primary concern.

Evaluating Assumption 2: Smoke and Others' Health in Public

Assumption 2 states that smoke is injurious to the health of others in public places. The argument declares that public smoking is an offence under the law. Laws are often enacted to protect citizens, particularly from harm caused by the actions of others. Making public smoking an offence strongly implies that the act of smoking in public is considered harmful or detrimental to other people present in those public spaces. This harm is most commonly related to the health risks associated with inhaling second-hand smoke. Therefore, the legal prohibition of public smoking makes sense if there is an underlying assumption that it negatively impacts the health of non-smokers in the vicinity. The public nature of the offence directly points towards a concern for the public's well-being, which aligns with assumption 2.

Conclusion on Implicit Assumptions

Based on the analysis:

• Assumption 1 (smoking harms the smoker) is a general fact about smoking but is not necessarily the implicit reason for making smoking an offence *in public*.
• Assumption 2 (smoke harms others in public) provides a direct and logical justification for a law that specifically prohibits smoking *in public*. The law being restricted to public places suggests the harm to others is the primary concern driving the legislation.

Thus, the argument that public smoking is an offence under the law implicitly assumes that smoking in public is injurious to the health of others present.

Therefore, only assumption 2 is implicit in the given argument.

Revision Table: Argument & Assumptions

Additional Information: Understanding Arguments and Assumptions

When analyzing arguments and assumptions in critical reasoning, it's important to identify the unstated premises that the argument relies upon. These assumptions bridge the gap between the stated premises and the conclusion (even if the conclusion isn't explicitly stated, the argument itself implies one, like the justification for the law in this case).

• An assumption must be something the arguer believes to be true when making the argument.
• If the assumption is false, the argument is typically weakened or fails to support its point.
• In the context of laws, especially those related to public conduct, the underlying assumptions often pertain to public safety, health, or order.

In this specific argument about public smoking laws, the most plausible underlying reason for making it a public offence is the protection of the non-smoking public from the harmful effects of second-hand smoke. This makes Assumption 2 the implicit assumption.