What is meant by “thumma lā nusallim intifāʾ al-takhṣīṣ”?

Fronting the Subject: Restriction, Reinforcement and the al-Jurjani–al-Sakkaki Debate

• We affirm certain restriction for every fronted noun
• We identify restriction with grammar itself
• We do not accept that all possibilities of restriction have vanished
• We reject all contextual indicators