Every LEO Police, Guard or Close Protection Agent (bodyguard) needs to have confidence in his or her ability to get the job done and go home safe to one's family. When push comes to shove, do you really have what it takes do avoid injury and liability?
A scientific method or process is considered fundamental to the scientific investigation and acquisition of new knowledge based upon physical evidence. Scientists use observations, hypotheses and deductions to propose explanations for natural phenomena in the form of theories. Predictions from these theories are tested by experiment. If a prediction turns out to be correct, the theory survives. Any theory which is cogent enough to make predictions can then be tested reproducibly in this way. The method is commonly taken as the underlying logic of scientific practice. A scientific method is essentially an extremely cautious means of building a supportable, evidence-based understanding of our natural world.The basis of all of my firms training is efficacy.
Just because you know something doesn't mean you can use it.
Knowledge without ability to implement is nothing more than persuasive conversation and interesting trivia. YOUR ability is the factor that matters most. When push comes to shove, can you deliver when needed? Can your partners and buddies depend on you? Can you depend on your ability to execute good judgement and skills and bring to bear the necessary attributes to survive or properly manage a violent encounter?