This defense acknowledges that the defendant did commit some sort of action but also states that this act was consented to by the victim. An example of this defense is consent to bodily harm.
This defense states that ones actions, which otherwise would be considered criminal, were necessary in order to defend oneself.
Although being intoxicated wont necessarily clear you of most crimes, it can in some situations negate an element of a crime.
This defense states that the amount of time the prosecution has to bring charges against a defendant has passed, and therefore the charges must be dropped.