Final answer:
Proof beyond a reasonable doubt is a legal term used in criminal cases. In the context of the passage, placing paragraphs 2-5 before paragraph 6 supports the central idea by providing evidence and analysis.
Step-by-step explanation:
The phrase 'proof beyond a reasonable doubt' is a legal term used in criminal cases. It means that the evidence provided in a trial must be so strong that there is no rational alternative explanation for the defendant's guilt. In the context of the author's decision to place paragraphs 2-5 before paragraph 6, it supports the central idea by presenting supporting evidence and analysis before drawing a conclusion or making a main point in paragraph 6.