what is the conflict between public policy and legal principles regarding intoxication?
Public policy aims to protect the public, it promotes good behaviour which would influence the law on intoxication.
Legal principles require fault to be voluntarily assumed, or a deliberate risk must be taken for liability.
Legislation like the criminal justice and immigration act 2008 restricts the defence of intoxication in cases like self-defence, this potentially disregards the principle that the defendant needs the right mental state to be guilty.