AD RIMANDAM VERITATEM

AD RIMANDAM VERITATEM ad rimandam veritatem (ad ri-man-d[schwa]m ver-i-tay-t[schwa]m). [Latin] Hist. For the investigation of the truth. ? Parol testimony was sometimes allowed ad rimandam veritatem. What is the legal equivalent of the term AD RIMANDAM VERITATEM in Chinese?