[Rev. 2012] Penal Code CAP. 63 9. Intention and motive (1) Subject to the express provisions of this Code relating to negligent acts and omissions, a person is not criminally responsible for an act or omission which occurs independently of the exercise of his will, or for an event which occurs by accident. (2) Unless the intention to cause a particular result is expressly declared to be an element of the offence constituted, in whole or part, by an act or omission, the result intended to be caused by an act or omission is immaterial. (3) Unless otherwise expressly declared, the motive by which a person is induced to do or omit to do an act, or to form an intention, is immaterial so far as regards criminal responsibility. 10. Mistake of fact (1) A person who does or omits to do an act under an honest and reasonable, but mistaken, belief in the existence of any state of things is not criminally responsible for the act or omission to any greater extent than if the real state of things had been such as he believed to exist. (2) The operation of this section may be excluded by the express or implied provisions of the law relating to the subject. 11. Presumption of sanity Every person is presumed to be of sound mind, and to have been of sound mind at any time which comes in question, until the contrary is proved. 12. Insanity A person is not criminally responsible for an act or omission if at the time of doing the act or making the omission he is through any disease affecting his mind incapable of understanding what he is doing, or of knowing that he ought not to do the act or make the omission; but a person may be criminally responsible for an act or omission, although his mind is affected by disease, if such disease does not in fact produce upon his mind one or other of the effects above mentioned in reference to that act or omission. 13. Intoxication (1) Save as provided in this section, intoxication shall not constitute a defence to any criminal charge. (2) Intoxication shall be a defence to any criminal charge if by reason thereof the person charged at the time of the act or omission complained of did not know that such act or omission was wrong or did not know what he was doing and— (a) the state of intoxication was caused without his consent by the malicious or negligent act of another person; or (b) the person charged was by reason of intoxication insane, temporarily or otherwise, at the time of such act or omission. P6-20 [Issue 1]