The raw data received through the senses, including sight, sound, touch, taste, and smell, which forms the basis of perceptual knowledge.
The active process of attending to and interpreting sensory input to identify patterns and phenomena in the external world.
Knowledge that is validated through direct observation and sensory experience, forming the cornerstone of scientific inquiry.
The unmediated awareness of the world as it is perceived in the present moment, prior to conceptual interpretation.