First sentence: Why this is the first line? This paragraph is the first sentence because it introduces a common mistake in scientific research. It does not refer to any previous information and gives a general idea about the topic. This follows the rule of Topic Sentence. Why other lines are not chosen? The other paragraphs are not chosen because they do not meet the criteria for being independent. For example, Paragraph 2 starts with "Ideally," which is a transitional word. Paragraph 3 starts with "Sometimes," which is also a transitional word. Paragraph 4 starts with "In that case," which indicates it is not independent. Paragraph 5 uses "The lesson is" which assumes prior knowledge.

Concluding sentence: Why this is the last line? This paragraph is the last sentence because it wraps up the main idea of the text. It gives a clear conclusion about the importance of handling data correctly. This follows the rule of Conclusive Words.

Paragraph pairs:

• Pair 1 (Paragraph 1 → Paragraph 2): Paragraph 2 connects with Paragraph 1 because it continues the idea of mistakes in handling data. The word "Ideally" shows a contrast to the mistake mentioned in Paragraph 1. This follows the Contrast rule.
• Pair 2 (Paragraph 2 → Paragraph 3): Paragraph 3 connects with Paragraph 2 because it shows a situation where the ideal is not followed. The word "Sometimes" indicates that there are exceptions to being open-minded. This follows the Logical Order rule.
• Pair 3 (Paragraph 3 → Paragraph 4): Paragraph 4 connects with Paragraph 3 because it explains the consequences of having a strong belief. The phrase "In that case" shows that it is a result of the situation in Paragraph 3. This follows the Cause and Effect Relationship rule.
• Pair 4 (Paragraph 4 → Paragraph 5): Paragraph 5 connects with Paragraph 4 because it summarizes the main point about handling data. The phrase "The lesson is" indicates a conclusion from the previous discussion. This follows the Summary Style rule.