Under the Bharatiya Sakshya Adhiniyam, 2023, which of the following is not a competent witness?

Section 124 of the Bharatiya Sakshya Adhiniyam, 2023 (formerly section 118 of the Indian Evidence Act, 1872) makes all persons competent to testify unless the court considers that they are prevented from understanding the questions put to them, or from giving rational answers to those questions, by tender years, extreme old age, disease of body or mind, or any other cause of the same kind. Minority, deafness or inability to speak is not an automatic disqualification. Section 125 specifically permits a witness unable to communicate verbally to give evidence by writing or signs made in open court, with the assistance of an interpreter or special educator and videography of the statement.