The statement accurately highlights the physiological effect of intoxication – it diminishes a person's cognitive faculties, impacting their perception and judgment, and consequently, their ability to foresee the consequences of their actions. In criminal law, this impairment can sometimes be a relevant factor in determining culpability, but it is not a blanket defence. The Indian Penal Code (IPC) distinguishes between voluntary and involuntary intoxication.

General Principle: Under Indian criminal law, intoxication is generally not a defence. Section 85 and 86 of the IPC govern this aspect.

1. Involuntary Intoxication (Section 85, IPC): Section 85 provides a complete defence if the intoxication was involuntary and rendered the person incapable of knowing the nature of the act, or that what they were doing was wrong or contrary to law. The key elements are:

• Administered without knowledge or against will: The intoxicant must have been given to the person without their knowledge or against their will (e.g., drugged without consent).
• Incapacity to understand: As a result of such intoxication, the person was incapable of knowing the nature of the act, or that it was wrong or illegal.

If these conditions are met, the person is treated as if they were suffering from unsoundness of mind at the time of the act, and thus, no offence is committed. The burden of proving involuntary intoxication and its incapacitating effect lies on the accused.

2. Voluntary Intoxication (Section 86, IPC): Section 86 deals with voluntary intoxication, which is the more common scenario. It states that if an act is done by a person who is intoxicated voluntarily, and the act is one which would be an offence if done with a particular knowledge or intent, then that person shall be presumed to have the same knowledge as they would have had if they had not been intoxicated.

• Presumption of Knowledge: The law presumes that a voluntarily intoxicated person has the knowledge that a sober person would have. This means that if an offence requires 'knowledge' as an ingredient (e.g., knowing an act is likely to cause death), voluntary intoxication will generally not negate this knowledge.
• Specific Intent vs. Knowledge: The crucial distinction arises when an offence requires a specific intent (mens rea) beyond mere knowledge. While Section 86 presumes knowledge, it does not explicitly presume intent. If voluntary intoxication is so profound that it prevents the accused from forming the specific intent required for a particular crime, it may serve as a partial defence, reducing the charge to a lesser offence that does not require that specific intent.
  • Example: If 'murder' requires an 'intention to cause death', and extreme voluntary intoxication prevents the formation of such an intention, the charge might be reduced to 'culpable homicide not amounting to murder' (which requires only knowledge or intention to cause bodily injury likely to cause death, or knowledge that the act is so imminently dangerous that it must in all probability cause death).

Leading Cases:

1. Basdev v. State of Pepsu (1956 SC): This landmark Supreme Court case clarified the application of Section 86. The Court held that while voluntary intoxication is generally not a defence, if the degree of intoxication is such that it renders the accused incapable of forming the specific intent required for the offence, it might reduce the gravity of the crime. However, mere intoxication leading to loss of control or inhibitions is not enough; the intoxication must be so severe as to negate the specific intent.
2. DPP v. Beard (1920 AC, English case, influential in India): This case established the principle that for crimes requiring a specific intent, if the accused was so drunk as to be incapable of forming that intent, they could not be convicted of that crime. However, they could still be convicted of a lesser crime not requiring that specific intent.
3. Jageshwar v. State of MP (1984 SC): The Supreme Court reiterated that mere consumption of alcohol is not sufficient to invoke the defence of intoxication. The accused must prove that the intoxication was of such a degree that it rendered them incapable of forming the requisite mens rea for the offence.
4. Mathai v. State of Kerala (2005 SC): This case reaffirmed that the burden of proving involuntary intoxication and its incapacitating effect lies squarely on the accused. The Court emphasized that the mere fact of being intoxicated is not enough; the accused must demonstrate that they were deprived of their free will and understanding.

Conclusion: The law on intoxication in India strikes a balance between holding individuals accountable for their actions and acknowledging the impact of extreme impairment. While involuntary intoxication can be a complete defence, voluntary intoxication is generally not, unless it is so severe as to negate a specific intent required for a particular offence, potentially leading to a conviction for a lesser crime. The courts consistently emphasize that the degree of intoxication must be profound enough to genuinely incapacitate the accused from forming the necessary mental element, and the burden of proving this lies with the defence.