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esse est percipi doctrine

philosophy
Also known as: to-be-is-to-be-perceived doctrine

Quick Summary

The doctrine of esse est percipi, meaning "to be is to be perceived," is a core tenet of subjective idealism. This philosophy, most famously articulated by George Berkeley, posits that reality is fundamentally mental. It asserts that nothing exists independently of a perceiving mind; material objects are merely collections of ideas or perceptions. Therefore, the existence of anything outside of a mind is contingent upon being perceived by that mind. In its most extreme form, this can lead to solipsism, the belief that only one's own mind is sure to exist.123

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