All Knowledge Can Be Grouped Into Three

Metaphysics
1-50% Replicable: Paradoxical

Superphysics
51-99% Replicable: Subjective

Physics
100% Replicable: Objective
There are 3 principal sciences: Mechanics, Medicine, Ethics

Rene Descartes
The Principles of Philosophy, Preface
The Sciences That Open Up The Universe
Things cannot have absolute Existence without any relation to their being perceived. They cannot have any Existence without the Minds which perceive them. I find it strange that people think that Houses, Mountains, and all sensible Objects have a Real Existence, distinct from their being perceived by the Understanding.

George Berkeley
The Principles of Human Knowledge, Article 3