Tell us the difference between a "doctrine" and a "fact".

Gravity is not a "doctrine", no matter what one does, an object will
eventually be attracted back to earth (except if it exceeds escape
velocity). Gravity is a fact, not a "doctrine". So how is this
"inevitable" decline a fact?

I want someone that considers "doctrine" to always be "fact" to stay far
away from my mill. What if the individual believes that the "doctrine of
the mill" results in a manual mill spontaneously moving itself to make a
cut? Or the mill will stop cutting before it plunges too deep?

Lawrence Glickman wrote:
ENTROPY!
4. a doctrine of inevitable social decline and degeneration