preranasabnis[at] gmail.com When comprehending sentences, we tend to use various cues to attain the correct interpretation in the shortest time-span possible. When we are encounter semantically reversible sentences, the cues we normally use are rendered insufficient. So far, most of the research in this area has focused on the processing of declarative passive sentences. However, reversible relations are also observed in other sentence types such as comparative sentences, and locative sentences. The primary aim of this project is to understand the comprehension of reversibility in sentences regardless of sentence type. It uses neurostimulation (TMS) methods with healthy individuals, and behavioural methods with aphasic patients. Through this project, we hope to gain a better understanding of the various mechanism involved in such comprehension, and neural substrates underlying it. We also hope to gain a better understanding of how these impairments manifest in different types of aphasia.