Usulis (Arabic: الاصولية) are the majority Twaler Shia Muslim group. They differ frae their nou hintle smawer rival Akhbari group in favorin the uise o ijtihad i.e. raisonin in the creation o new rules o fiqh; in assessin hadith tae exclude traditions they believe unreliable; in considerin it obligatory tae obey a mujtahid when seekin tae determine Islamically correct behavior.
Syne the crushin o the Akhbaris in the late 18t century, it haes been the dominant schuil o Twaler Shia an nou forms an owerwhelmin majority athin the Twaler Shia denomination.