Cat Park is built on the principle of active inoculation, pioneered by Cambridge's Social Decision-Making Lab. Just as vaccines expose the immune system to a weakened pathogen to build resistance, playing through disinformation scenarios in a safe context builds cognitive resistance to disinformation in real life. Players who complete Cat Park are 19 percentage points more likely to correctly identify disinformation and 15 percentage points less likely to share it, compared to a control group.