If a tree falls in a forest (Wikipedia)

"If a tree falls in a forest and no one is around to hear it, does it make a sound?" is a philosophical riddle that raises questions regarding observation and knowledge of reality. • George Berkeley was a philosopher who created and promoted a theory he called "immaterialism" later referred to as "subjective idealism". His dictum was "Esse est percipi" - "To be is to be perceived". He talked