philosopher who posed what can i know

The philosopher who posed the question "What can I know?" is Immanuel Kant. Kant explored this epistemological question extensively in his seminal work, the "Critique of Pure Reason," where he examined the limits and scope of human knowledge and argued that while sensory experience shapes understanding, reason plays a fundamental role in how knowledge is formed. His philosophy marked a significant turning point in Western thought by focusing on how the mind perceives and structures reality rather than on the nature of the objects themselves.