French phrase
Sur quelles preuves reposent ~ ?
Meaning
On what evidence do ___ rest?
When to use it
A formal question asking what evidence supports a claim. It is common in academic discussion and may sound somewhat challenging.
Example dialogue
Vous dites que cette méthode fonctionne.
You say that this method works.
Sur quelles preuves reposent ces conclusions ?
On what evidence do these conclusions rest?