प्र: Theory of Idealism was expounded by George Hegal, Bishop George and Berkeley According to this

• 1
  mathli is an illusion and that the only reality that which exists mentally
• 2
  good was pleasure and that evil was pain
• 3
  base of knowledge is sense-experience, that is, observations governed by scientific principles
• 4
  all knowledge is derived from sensory experience, by observing and experimenting