It is characteristic of those philosophers, who derived their own idealistic systems from Kant, that they did not study Plato directly, let alone adopt his doctrines, but that they were led by stimuli received from Plato to independent philosophical thought and conclusions. Their idealism is subjective in opposition to Plato's objective and realistic idealism. Some of them did not even attempt to understand fully the founder of all idealistic schools. At other times they unconsciously developed or carried to their conclusion thoughts which Plato only hinted at.