More generally, the defense would be denied to people experiencing symptoms of intoxication who continued to consume the spiked drink because they ought to have known what was happening to them. Equally, if no further consumption occurred but they ought to have recognized that they were affected by an unknown substance, beginning an activity such as driving would not fall within the defense. In other words, the policy underpinning the operation of the law favors the protection of the public as against the interests of an individual who recklessly or with wilful blindness exposes the public to danger.