Scientific principles are general rules that are followed while doing science or rules that nature tends to follow.
Scientific Principle Examples
The Principle of Least Time a.k.a. Fermat's Principle which states that "light travels between two given points along the path of shortest time."

The principle of cause and effect which states that in order for something to happen there must be an underlying cause or is contingent.

Archimedes Principle: the buoyant force on an object is equal to the weight of the fluid displaced by that object

Examples where principles guide peoples actions would be: making sure all your hypotheses are testable and falsifiable (as opposed to unfalsifiable claims, see Russell's Teapot)
by Tibriel August 25, 2017
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