Depending on contradiction, maqbul hadiths (sahih and hasan) can be categorized into two groups: muhkam (perfect) and muhtalif (disputed).

Muhkam is an accepted hadith that has not been contradicted by another.

Muhtalif is a maqbul hadith that is contradicted by another maqbul hadith. If the contradicting hadith is not maqbul, it means that there is no contradiction.

If the muhtalif hadith can be removed from the contradiction easily, in other words, if these two hadiths can be combined and compromised, it is understood that there is no contradiction between them and both of the hadiths become muhkam.