Criteria Of Hadith Grading
It is a very comprehensive topic in itself and connot be condensed to one reply. At the same time, Hadith classification and categorization involves alot of subjectivity at the end of different Muhaddeseen as well. Following link is really helpful to grasp the concept of Hadith Grading: https://www.islamic-awareness.org/hadith/ulum/atit.html Please also see : Discussion 59270