Arthur Schopenhauer was a German philosopher who disagreed with many of the ideas of Immanuel Kant, another German philosopher. Schopenhauer did not like Kant's idea of schemata, which are logical systems that work like a blueprint to explain aspects of the universe. Schopenhauer thought that Kant's schemata were too rigid and did not allow for an individual's personal experiences. Schopenhauer wanted to create a philosophy that had a more living and changing view of the world. He believed that Kant's schemata were too mechanical and did not take into account the complex nature of life. In his criticism of Kant's schemata, Schopenhauer argued that they did not account for our own feelings, experiences and emotions, which shape how we understand the world. He argued that Kant's idea of fixed categories and rules doesn't give enough freedom for us to explore our own experiences and come to our own conclusions about the world.