The phrase "actual principle" is correct and usable in written English.
It can be used when referring to a principle that is real, genuine, or in effect, often in contrast to theoretical or hypothetical principles.
Example: "The actual principle behind the experiment was not fully understood by the students."
Alternatives: "real principle" or "genuine principle".
The potential principle is matter, the actual principle, form.
This experimental setup is effective to evaluate algorithms that detect outliers, since the injected edges are random thus do not follow the actual principle that generated the real-world graph.
But if the exceptions to the rule of promise keeping are all those cases where keeping a the promise is less than optimal, then the 'rule' is no more than a rule of thumb, and the actual principle governing decisions on promise-keeping is the principle of maximal utility.
However, the same applies to numerous supporters of universal health coverage who are upset with the fact that the fee exemption system is riddled with inconsistencies and believe that the fee exemption measures should be carefully prepared and solidly supported if the actual principle behind them is not to be discredited.
But is this divide based on actual principles, or merely on differentiating ourselves from the other political tribe?
Mr. Romney may have been acting out of political expediency in creating the universal health care system in Massachusetts — it is never easy to determine his actual principles.
And I realized he was right — if you were to analyze the mood of the event, without thinking about the actual principles of the campaign, it felt friendly and open.
The government's ideas were blasted, both on their actual principles and because without details, critics were free to assume the worst about the plan's execution – not that past evidence suggests such an assumption would be wrong.
Never in my adult lifetime has one politician so perfectly embodied everything that is malign about my country: the proto-fascist nativism, the know-nothingism, the utterly cavalier lack of knowledge about the actual principles on which the country was founded.
Even though the first view is more restrained and is sufficient for applying rational choice methods to understanding social and political phenomena, many researchers hold the view that rational choice theory is a powerful analytic tool precisely because it reflects the actual principles that must characterize purposive agency.
Although the curve by EKF algorithm is close to the original measurement data, according to the actual principles of flight, the aircraft should have a smooth movement, which fully illustrates that there is measurement error, and we should filter the data before using it.
