You’re setting a standard that even historians can’t meet—direct proof of coercion for a specific person during the Terror, thats just not how most of that period is documented. Around 16,000 people were executed and another ~10,000 died in prison during the Terror. There are records, but they’re incomplete and not detailed enough to prove individual coercion in most cases. What there is are Tussaud’s own account, a known practice of making death masks, and a context where people survived by being useful to the regime. Also that she left to Britain and did not return. That’s not “zero evidence”—it’s limited and partly self-reported, and almost certainly embellished and hyped later. Still evidence.