(quantum mechanics) The Heisenberg uncertainty principle.

(physics) any of several principles, in relativity, concerned with the uniformity of physical measurements in different frames of reference

(physics) The principle that the inertia of a body arises from its relation to the totality of all other bodies in the universe.

plural of Mitchell principle

The principle that describes the phenomenon wherein a small percentage of a population accounts for a large proportion of a particular characteristic of that population.

(physics) The assumption that each point on a wavefront may be regarded as a source of secondary waves and that the position of the wavefront at a later time is determined by the envelope of these secondary waves; proposed in order to explain the fact that light travels in a straight line and casts sharp shadows.

The notion that more will be given to those that already have.

Any of the six recommendations that arose from an investigation of decommissioning of weapons in Northern Ireland in 1996, urging all parties involved in the conflict to renounce violence and agree to disarmament before entering into all-party negotiations.

(logic) The principle or axiom of classical logic and some other logical systems stating that if a contradiction or a false proposition is proven to be true, then it proves that everything is true. In symbols: ⊥→P

The philosophical notion that an item drawn at random from one of several sets or categories is more likely to come from the most numerous category than from any of the others.