To assess the book’s foreign-origin cause:
1. Was the word a proper name in its original non-Arabic language? If no, the condition fails, as with lijām.
2. If yes, is it written with more than three letters? If yes, it follows the Ibrāhīm pattern.
3. If there are three letters, check the middle letter: vowelled, as in Shatar; sākin, as in Nūḥ, which the book treats as fully declinable.
Only after classifying the noun should you identify the governor and the syntactic case.