Empiricists are philosophers who believe that knowledge comes primarily from sensory experience. They argue that our understanding of the world is shaped by what we observe, hear, touch, taste, and smell. This approach emphasizes the importance of evidence and experimentation in forming beliefs and theories. Key figures in empiricism include John Locke, George Berkeley, and David Hume. These thinkers challenged the idea that knowledge could be gained solely through reason or innate ideas. Instead, they promoted the idea that all concepts and knowledge must be rooted in actual experiences and observations of the world around us.