I know it is old, but no-one has hit on exactly what is happening. It is decision trees, and it does make use of the winnowing effect of true-false questions. T

I know it is old, but no-one has hit on exactly what is happening. It is decision trees, and it does make use of the winnowing effect of true-false questions. The last ingredient is user feedback. If it cannot correctly guess your character, it asks you to enter them. It then saves your person and the decision tree that got you to them for future use: croudsourcing.