Patterns help us organise observations and make predictions. However, a short sequence can fit several rules, and a pattern in past data may not continue. Recognising uncertainty is part of sound reasoning. For a number sequence, propose a rule and check it against every given term. Ask whether another rule could also fit. For everyday observations, consider how the data was collected and whether exceptions were ignored. A memorable example can feel more common than it actually is. Seeing several delayed buses does not establish the cause of the delays. You may need observations across different times and routes. The useful question is not only “What pattern do I see?” but also “What evidence would show this interpretation is wrong?” Practice: Invent a short sequence with two possible continuation rules. Explain what additional term or condition would distinguish the intended rule.