Underdeveloped chains of reasoning — stating points without 'Because, Leads to, Therefore' steps
“Your responses will score highly if they show clear evidence of development. Examiners are looking for a 'chain of reasoning'. Make one point per paragraph, apply it to the context of the question, and then explain it carefully, step-by-step.”— 9EC0 Paper 1, June 2024
How to fix: Every paragraph must walk through cause → mechanism → effect using BLT linking words ('because', 'leads to', 'therefore', 'as a result'). One stated fact = AO1 only. A two-step chain that shows why the fact matters in context = AO2 (analysis). Examiners describe a chain of reasoning as the single most-rewarded skill.