Is thinking dosa? Is feeling dosa? Is sensation dosa? What then is dosa? Dosa is a quality – it has its own characteristics and quality. But you need to continue to watch to understand.
You can understand in many ways; not only this way. If you watch it repeatedly, you can understand the nature of dosa and from different angles. For example, you can understand that dosa mind can become an object because you can feel and know the quality of an object. You can understand it as just an object.
Be interested and continue to watch.