except knowledge of possibility. possibility is known and it is not knowledge. rather knowledge encompasses it follows it and is related to it as it is. if knowledge is assumed to not exist the known does not exist. and if the known is assumed to not exist knowledge is not existent. so knowledge and the known are two things one of them is dependent and the other is followed. if we assume that rational people turn away from estimating possibility and are unaware of it we would say possibility is not eliminated but rather possibilities in themselves but the minds are unaware of it or the minds and rational people are absent. so possibility inevitably remains.
إلا العلم بالإمكان. فالإمكان معلوم وهو غير العلم، بل العلم يحيط به ويتبعه ويتعلق به على ما هو، والعلم لو قدر عدمه لم ينعدم المعلوم. والمعلوم إذا قدر انتفاؤه انتفى العلم. فالعلم والمعلوم أمران اثنان أحدهما تابع والآخر متبوع. ولو قدرنا إعراض العقلاء عن تقدير الإمكان وغفلتهم عنه لكنا نقول لا يرتفع الإمكان بل الممكنات في أنفسها، ولكن العقول غفلت عنها أو عدمت العقول والعقلاء. فيبقى الإمكان لا محالة.