Why is merely counting the words insufficient in the historical repeated-divorce example?

Particles of Meaning: Waw, Fa, Thumma, Bal and Lakin

• Because thumma can never convey a legal sequence
• Because the subject may change after the first effect and speech may be separate or connected
• Because each later utterance must necessarily have greater effect
• Because thumma turns all clauses into one unordered ruling