《中华人民共和国刑事诉讼法》第４２条规定，“犯罪嫌疑人、被告人供述和辩解”系刑事证据之一种。在刑事证据学理论上，犯罪嫌疑人、被告人供述和辩解与证人证言、被害人陈述同属于言词证据。言词证据是言词主体即有作证能力（正常的感知能力、记忆能力和表达能力）的自然人 Article 42 of the Criminal Procedure Law of the People’s Republic of China stipulates that “the criminal suspects and defendants confession and excuse” is one of the criminal evidences. In the theory of criminal evidence, the criminal suspects and defendants’ confession and excuse and witness testimony and victim’s statements all belong to the verbal evidence. Verbal evidence is the subject of the verb that is the natural ability to testify (normal cognitive ability, memory and presentation skills) of the natural person