I’m talking about the current act, after the new section 33.1 came into force. It is true that it is somewhat contradictory, because the accused must prove that they were in a state of automatism and also that the risk of falling into such a state was not foreseeable.
Based on our understanding of the Brown ruling, and after the new section 33.1 came into force, the only circumstances that could lead to a finding of not guilty, meaning that the defence was used successfully and there was no proof of negligence, are those in which it was demonstrated that a reasonable person could not have foreseen what would happen in a state where they were not aware of what they were doing or was not in control of their actions. In other words, the effect or consequences on their mental state were neither foreseen nor reasonably foreseeable. Those circumstances led the Supreme Court to conclude that there was a rights violation under the Canadian Charter of Rights and Freedoms.
Although this is possible from a theoretical point of view, it is extremely improbable that a reasonable person would not foresee these kinds of risks.