Which school is identified with al-manzilah bayna al-manzilatayn?

Minor and Major Sins, Faith, and the Status of a Major Sinner

• The Muʿtazilah, who place the major sinner between believer and unbeliever
• All Khārijites, who call the major sinner a perfect believer
• Sunni scholars, who use it to permit grave sins
• All jurists, who deny degrees of faith