The variation of questions and questioners in the age of descent of Holy Quran

The Holy Qur’an invites men to learn knowledge and ask like a wise person if they do not know any thing. Questions are applied to ascertain the unknown by using the tools such as word, letters and signs. Each question has light and understanding, those who knows, may ask better. There is a close relation between question and knowledge.These wuestions can be divided to three categories in view of motive of the questioner: -Logical questions, which Holy Quran ordains to ask; - Unneessary and illogical questions which have been forvidden in a number of verses; -Non- innocent questions which the Holy Quran and the tradiions condemned. Asking questions and their multiplicity are approveable in instances having the following conditions: -Be not harmful; - Be not asked for molestation and teasing purposes; -Be benefitable. Sometimes asking questions or unwilling the facts may cause pessimism and disturbance of tranquality of the individual and of the society.