According to search-discovered classical Islamic scholarship, the Quranic concept of avoiding guesswork, articulated in Surah Al-Hujurat, verse 12, is a fundamental principle of Islamic social ethics. This verse explicitly commands believers to 'avoid much [negative] assumption (Az-Zann), for indeed, some assumption is a sin.' Tafsir by eminent scholars such as Ibn Kathir clarifies that this refers to unfounded doubts and suspicions about the character and actions of fellow believers. Al-Qurtubi and other jurists have detailed the different categories of 'zann,' distinguishing between the forbidden (baseless negative thoughts about the righteous), the permissible (suspicion based on evidence, especially in legal matters), and the recommended, which is 'Husn al-Zann' or thinking well of others. This prohibition is the first in a series of three interconnected social ills mentioned in the verse, as baseless suspicion often leads to the subsequent sins of spying (tajassus) and backbiting (ghibah). Thus, by commanding the avoidance of guesswork, Islam aims to cut the very root of discord, protect individual honor, and foster a community built on trust, mutual respect, and حسن الظن (thinking well of others).