What is meant by al-manzilah bayna al-manzilatayn?

The Four Proofs: Fiqh, Uṣūl al-Fiqh and Kalām

• Treating every sinner as an unbeliever in worldly law
• Unconditionally declaring every sinner fully righteous
• Assigning the grave sinner an intermediate theological status
• Declaring the relationship between sin and faith meaningless