Input (grade 13): The Dutch professor Francois de la Boe Sylvius, a follower of Descartes, believed that all disease was the outcome of chemical processes, and that acidic lymph fluid was the cause of cancer.
Output (grade 7): The Dutch professor Francois de la Boe Sylvius believed that all disease was the outcome of chemical processes. He believed that acidic lymph fluid was the cause of cancer.