What is the concept of philosophical suicide and how does it relate to existentialism?

Philosophical suicide is the act of avoiding the challenges and uncertainties of life by embracing a belief system or ideology that provides false comfort or certainty. In existentialism, this concept is seen as a betrayal of one's own freedom and responsibility to create meaning in a seemingly indifferent universe. Existentialists believe that true authenticity and fulfillment come from facing the inherent absurdity and uncertainty of existence without resorting to false beliefs or illusions.