When the subject is expressed, the wording itself apparently presents its referent. When omitted, the listener may need context and inference to identify it. This does not establish a universal ranking in which every linguistic indication is weak and every intellectual indication is strong; their functions differ by situation.
فإن الاعتماد عند الذكر على دلالة اللفظ من حيث الظاهر، وعند الحذف على دلالة العقل
For expressed mention, one apparently relies on verbal indication; for omission, on inferential indication.
Printed page 134 also raises objections to an overly simple contrast: understanding words already depends on concepts and linguistic convention. The useful distinction is between explicit wording and recovering what is left unsaid, rather than an absolute opposition between language and reason.