A useful contribution, but for me the decisive issue is the Qur’anic injunction itself.
The Qur’an never frames marriage around children. It frames it around adult women (nisa’) with sound judgment (rushd) and social responsibility.
“Test the orphans until they reach marriageable age; then if you perceive in them sound judgment (rushd), release their property to them…”
(Qur’an 4:6)
A nine-year-old cannot meet this standard - mentally, legally, or socially. The Qur’an does not equate puberty with adulthood, nor does it permit marriage without clear agency and competence.
Historically, the “6 and 9” reports rest on a narrow and late transmission line and conflict with broader chronological indicators, including Aisha’s public role and age comparisons with her sister Asma.
Whether Aisha was in her late teens or older, the core point stands: the child-marriage narrative contradicts Qur’anic law itself.
The Qur’an sets the standard. History must be read through that lens - not the other way around.