The truth-functional conditional compound P→Q that is named, as material implication, and is equivalent to the truth functional and , has made satisfactory results in the complex mathematical arguments.\ud Were the ancient logicians (Avicenna and his followers) aware of it? This is the question that its answer can influence many comparative discussions in different areas of Ancient and Modern logic. The central aim of this paper is to review different answers to this question and evaluate them. Some believe that the Etefaghieh is the same as material implication. Some believe that the definition of Mottaseleh (that is divided to Etefaghieh and Lozomieh) is the same as the definition of material implication. Other logicians believe that the...