It is a simple acronym for Keep It Simple, Stupid! This is how your thoughts should be during a game. Training is the time to learn how to do new things, matches are the times to simplify your thinking and let your training and instinct take over. You practice moves to improve your ability to perform them without consciously thinking about the movement, instead you can focus on reading the opposition and choosing the right option. Your instincts are your experiences and trainings combined to create an obvious course of action. For example in a scrum, you notice the opposition prop is more tense than normal that probably means he needs to get his side up to give the backs good ball. The obvious course of action is to call something that counters this movement. A backs example of combining training and instinct occurs when you have been setting a platform by running a 10-12 switch during the first 30 minutes of the game. As a 10, you notice the opposition 10 is staying in his channel and the 12 is pinching down hard to assist in the tackle. You pick a scrum in the 32nd minute to dummy the switch and make a line break. Your training helps you identify the weakness, your instinct tells you when it will be most effective to execute.