Sometimes, I am asked about religious matters, and when I am not sure of the answer, I reply saying: "I think the answer is so and so". Is it permissible to answer this way?
All Praise is due to Allah Alone, and peace and blessings be upon His Messenger, his family, and Companions.
It is impermissible for a Muslim to issue a Fatwa without knowledge for Allah (Exalted be He) states:
And follow not (O man i.e., say not, or do not or witness not) that of which you have no knowledge.
And He (Exalted be He) states:
Say (O Muhammad صلى الله عليه وسلم): "(But) the things that my Lord has indeed forbidden are Al-Fawâhish (great evil sins and every kind of unlawful sexual intercourse) whether committed openly or secretly, sins (of all kinds), unrighteous oppression, joining partners (in worship) with Allâh for which He has given no authority, and saying things about Allâh of which you have no knowledge."
Consequently, you should say, "Allah knows best" or "I do not know" if you are not certain of the correct answers to the questions that you are asked, for this is safer for your religion and honor according to religious ethics.May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.