An extreme form of skepticism that denies all existence.
A doctrine holding that all values are baseless and that nothing can be known or communicated.
2-Rejection of all distinctions in moral or religious value and a willingness to repudiate all previous theories of morality or religious belief.
3-The belief that destruction of existing political or social institutions is necessary for future improvement.
4-also Nihilism A diffuse, revolutionary movement of mid 19th-century Russia that scorned authority and tradition and believed in reason, materialism, and radical change in society and government through terrorism and assassination.
5-Psychiatry. A delusion, experienced in some mental disorders, that the world or one's mind, body, or self does not exist.
Kinda like logic plus a completly open mind. No assumptions and no biases. Makes so much sense but it is the hardest train of thought to actually follow.