доказателствен означава в английски

evidential▼(of or providing evidence)
adjective
[UK: ˌe.vɪ.ˈden.ʃəl] [US: ˌe.vɪ.ˈden.ʃəl]

probative▼(tending to prove a particular proposition)
adjective
[UK: prəʊ.ˈbeɪ.tɪv] [US: proʊ.ˈbeɪ.tɪv]

proof▼(used in proving or testing)
adjective
[UK: pruːf] [US: ˈpruːf]