In closed places is essential the existence of emergency doors, be- cause if an accident happens then people need to leave quickly. The existence of an emergency exit is as important as its location, because it has to be located on an easy access point. Computer simulations are very useful tools to emu- late incidents and the behavior of people in emergency situations. In addition, cognitive multiagents systems aim to mimic human behavior. This paper pro- poses the validation of a cognitive multiagent based tool to simulate evacuation through a proof of concept, that two emergency doors are better than one.