What is the first analytical step when emphasis, substitution, and istiʾnāf all seem possible?

Supplementary Practice 3: Rhetorical Judgment, Contextual Evidence and Combined Devices

• Treat the presence of wāw as conclusive for all three
• Always interpret repeated words as evidence of substitution
• Determine what the second clause actually does to the earlier judgment
• Invent a contextless implied question and insist on istiʾnāf