What must be verified before extending a rule through dalālat al-naṣṣ?

Four Modes of Textual Indication: ʿIbārah, Ishārah, Dalālah and Iqtiḍāʾ

• That both cases use the same word count
• That the reason is genuinely evident in the language of the text
• That one person performs both acts
• No legal distinction matters in any case