Data Sufficiency — Departure time today: At what time did the train leave today? Statements: I. The train normally leaves on time. II. The scheduled departure is at 14:30.

Introduction / Context:
The task is to determine today’s actual departure time. Data sufficiency asks whether the statements individually or together allow a definite answer without extra assumptions (like “today was routine”).

Given Data / Assumptions:

• I: The train “normally” leaves on time (a general tendency, not a guarantee for today).
• II: The timetable lists scheduled departure at 14:30.
• We cannot infer today’s punctuality unless explicitly stated.

Concept / Approach:
Distinguish between normative information (usually, normally) and fact for the specific day in question. Schedules provide intended times; actual operations can differ due to delays or advancements.

Step-by-Step Solution:
Statement I only says “normally on time.” It does not say “today it left on time.”Statement II only provides the scheduled time 14:30.Even when combined, we still lack confirmation that today adhered to the schedule.Therefore, we cannot determine the exact departure time for today.

Verification / Alternative check:
If Statement I had said “today it left on time,” then with II we could conclude 14:30. But “normally” is not “today.” Hence insufficiency remains even after combining.

Why Other Options Are Wrong:

• I alone: Insufficient—no specific confirmation for today.
• II alone: Insufficient—timetable ≠ actual.
• Either or both: Still cannot fix today’s actual time.

Common Pitfalls:

• Equating “normally” with “always” or “today.”
• Assuming punctuality without explicit evidence.

Final Answer:
Neither I nor II is sufficient