Why cannot every use of “إِنَّ أَخَاكَ قَادِمٌ” be classified as exclusively ṭalabī?

Aḍrub al-Khabar: Ibtidāʾī, Ṭalabī and Inkārī Reports

• Because inna cannot occur in a report
• Because it is always interrogative
• Because it contains no emphasis
• Because in context it may also counter mild denial