Blanche Descartes is not a well-known person or concept. Therefore, it is difficult to provide an explanation of this topic. However, there is a possibility that the term refers to Blanche Descartes, who was a French philosopher and mathematician. René Descartes, a famous philosopher, had a daughter named Francine who died at a young age. He also had a niece named Blanche Descartes, who was possibly named after his late daughter. Blanche Descartes was born in 1620, studied mathematics and philosophy like her uncle, and was known for her correspondence with other scholars.