«ثم الإسناد مطلقا سواء كان إنشائيا أو إخباريا، منه حقيقة عقلية»
Then predication as such, whether performative or informative, includes a form called rational literal predication.
“Unrestricted” means the discussion is not restricted to factual declarations. Informative utterances report a claim, while performatives—such as requests—may also contain an ascriptive relation.
The purpose of the passage is to classify the kind of ascription, not to erase the difference between informing and performing. The subsequent definition identifies the relevant standard.