The answer sheets of the UPSC mains are evaluated based on clarity, coherence, relevance, and originality. Evaluators assess how well candidates articulate their knowledge, adhering to the prescribed format while staying within word limits. The quality of arguments presented, critical analysis of issues, and depth of understanding determine scoring. Additionally, previous years' papers often influence evaluation criteria, focusing on practical applications and relevance to contemporary affairs. Hence, aspirants should aim to write structured, well-organized responses that directly address questions with substantiated reasoning and evidence.