Explore
The Visual Codex groups 38 biases into 5 categories. Browse, compare, and discover how they relate to each other.
Recognition, practice, reflection — not rote recall.
CogCheck is built around a simple idea: knowing the name of a bias is not enough. Real understanding comes from seeing the pattern in action, running thought experiments that reveal it, and sitting with the questions it raises.
Experiment
Thought experiments put you in a realistic decision. Your choice reveals whether bias shaped the outcome — with a debrief explaining why.
Compare
Use the Bias Comparator to see any two biases side by side — understand their differences and connections at a glance.