fa ???????? ??? ???? ????? ????? ?? ?? ???? ? ???? <div style=text-align: justify;><span style=font-size:10pt><span style=tab-stops:251.05pt><span style=unicode-bidi:embed><span new= roman= style=font-family: times=><span cambria= lang=EN style=font-family:>Hypothetical logic has a special place in the tradition of Avicennan logic. In this tradition, various opinions have been presented about the conditions of the truth of hypothetical sentences and the conditions of </span><span cambria= style=font-family:>syllogism</span><span cambria= lang=EN style=font-family:>s with hypothetical premises. One of the most prominent Avicennan logicians who discussed it is Shams al-D</span><b><span cambria= style=font-family:>?</span></b><span cambria= lang=EN style=font-family:>n Samarqand</span><b><span cambria= style=font-family:>?</span></b><span cambria= lang=EN style=font-family:>. The truth of </span><span cambria= style=font-family:>singular cogent</span><span cambria= lang=EN style=font-family:> hypothetical</span><span cambria= style=font-family:>s is </span><span cambria= lang=EN style=font-family:>a special topic of Samarqand</span><b><span cambria= style=font-family:>?</span></b><span cambria= lang=EN style=font-family:> about hypotheticals</span><span cambria= style=font-family:>. </span><span cambria= lang=EN style=font-family:>His analysis of this type of hypotheticals finally led to limiting the number of hypothetical syllogisms</span><span cambria= style=font-family:>. </span><span cambria= lang=EN style=font-family:>In this article, I compare the opinions of Samarqand</span><b><span cambria= style=font-family:>?</span></b><span cambria= lang=EN style=font-family:> about the conditions for the truth of </span><span cambria= style=font-family:>singular cogent </span><span cambria= lang=EN style=font-family:>hypothetical</span><span cambria= style=font-family:>s</span><span cambria= lang=EN style=font-family:> with the opinions of Fakhrudd</span><b><span cambria= style=font-family:>?</span></b><span cambria= lang=EN style=font-family:>n R?z? and Abdullah J?lan?. I show that the origin of the differences between these logicians is the difference in their interpretations of Avicenna's texts about </span><span cambria= style=font-family:>quantifiers of </span><span cambria= lang=EN style=font-family:>hypotheticals.</span></span></span></span></span><br> </div> ???? ????? ?????, ??? ????, ????????? ???????, ???????? ????, ??????? ?????? Singular Cogent Hypothetical, Quantifier of Hypothetical, Shams Al-D?n Samarqand?, Fakhrudd?n R?z?, Abdullah G?lan? 247 257 http://jpt.daneshafarand.org/browse.php?a_code=A-10-62442-6&slc_lang=fa&sid=6 A. Darabi ??? ??? ?????? 1003194753284600306979 1003194753284600306979 Yes Department of Logic, Iranian Institute of Philosophy, Tehran, Iran ???? ????? ????? ?????? ???? ? ????? ?????? ?????? ?????