Origins of the Usul of the Mutakallimeen

As-Salamu Alaykum wa Rahmatu Llahi wa Barakatuhu,

I drafted the below discussion for a different purpose however I thought I would share.

Please let me know of any corrections that you recommend, In Sha Allah.

The following texts only list 3 Istimdad for Usul: Ilm al-Kalam, Lughat al-Arabiyyah, and al-Ahkam ash-Shari’ah. My argument is that ‘Ilm al-Kalam’ is only part of it since the later texts of Usul included Kalam and Kalami terminologies based on their introduction and predominant usage after the time of Imam ash-Shafi’ee.