(IMAGE) Champalimaud Centre for the Unknown Caption In "controllable houses", the door's colour determines which room it leads to. In contrast, in "uncontrollable houses" the sequence of rooms is fixed, making your choices meaningless. Credit Romain Ligneul Usage Restrictions Only with proper cpation and credit. License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.