Infants possess remarkable capacities to process complex events and rationally modify hypotheses about them facing inconsistent evidence. These capacities suggest the existence of elementary logical representations for framing and pruning hypotheses, independent of natural language. However, little is known about infants' abilities to reason, let alone reason logically. I will present evidence that when they witness a scene not previously experienced, infants reason about it by applying basic logical principles. I will argue that such inferences are used to build strategies to inspect the scenes and make inferences to enrich their knowledge. I will present data about the behavioral correlates of this inferential processes in infants and adults, focusing on the case of disjunctive reasoning.