"What is her proof?"

Translation: ¿Cuál es su evidencia?

[Horatio_D]

Lo mismo '- Se dice prueba en español.

[Maaghi]

Evidence is not proof

[ClaireJentsch]

Porque 'cuál' en vez de 'qué'?

[lucy.luc1a]

My understanding is that "Qué es...?" means essentially "What is the definition of...?" Unless you are asking for a definition, you will want to use cuál.

[iyphd]

Cuál es incorrecto con la traducción: "Cuál es su prueba?"?

[Junia_D]

¿Cuál es su prueba? was accepted on 05/11/2019.

[Delphine383753]

Prueba is proof, should be correct!

[lona13a]

i wrote, "cuál es la prueba de ella," to indicate "her," but i was marked wrong. was i overthinking?

[deactivated user]

Proof and Evidence are two different things. This item is incorrect, and apparently it has not been fixed in last two years.

[JesusRogel3]

Prueba es válida como evidencia.

[JesusRogel3]

Cuál es su "prueba" o "evidencia".
Ambos son aceptables.

[JesusRogel3]

Cuál es su prueba?, or
Qué prueba tiene?( él or ella)