Critical Reasoning — Implicit Assumptions Statement on a public notice board at a ticket window: “Please come in queue.” Assumptions to evaluate: I. Unless instructed, people will not form a queue. II. People, in any case, want to purchase tickets.

Introduction / Context:
This critical-reasoning item asks which unstated beliefs must hold true for a public instruction—“Please come in queue”—to be meaningful at a ticket window. We assess necessity, not mere possibility.

Given Data / Assumptions:

• A notice instructs customers to form a queue.
• Assumption I: Without explicit direction, people may not queue.
• Assumption II: People anyhow want to purchase tickets.

Concept / Approach:
An implicit assumption is required for the statement to serve its purpose. If the notice would still make complete sense without an assumption, that assumption is not implicit. Queue instructions typically presuppose a risk of disorder unless rules are stated.

Step-by-Step Solution:

Verification / Alternative check:
Negate I: people always queue without instruction. Then the notice adds no value and is unnecessary—contradicting the motive for posting it. Negate II: not everyone wants to purchase tickets; the notice still makes sense for those who do. Hence only I is implicit.

Why Other Options Are Wrong:

• Only II / Either / Neither / Both: These either elevate a nonessential condition (II) or deny the necessary one (I).

Common Pitfalls:
Confusing audience intent with procedural order. The instruction exists to enforce order, independent of the motives of passersby.

Final Answer:
Only assumption I is implicit