Despite being ’mathematical’ and scientific, it is difficult to operationalise various concepts in DAT. For example, it is hard to see how the number of pro-crime attitudes a person has, or has been exposed to, could be measured. Similarly, the theory is built on the assumption that offending behaviour will occur when pro-crime values outnumber anti-crime ones. Without being able to measure these, we cannot know at what point the use to offend is realised and the offending career is triggered