““correlation and causation. It’s one thing to be linked to a disease; it’s quite another to cause a disease, which implies a directing, controlling action. If I show you my keys and say that a particular key “controls” my car, you at first might think that makes sense because you know you need that key to turn on the ignition. But does the key actually “control” the car? If it did, you couldn’t leave the key in the car alone because it might just borrow your car for a joy ride when you are not paying attention. In truth, the key is “correlated” with the control of the car; the person who turns the key actually controls the car. Specific genes are correlated with an organism’s behavior and characteristics. But these genes are not activated until something triggers them.””