If you stop that behavior on one group that you're experimenting with, and you allow it in another group that you're experimenting with, and then you present those rats with a cat odor-saturated collar, they're hardwired to flee and hide.
Ako to ponašanje zaustavite  u jednoj eksperimentalnoj skupini, a dozvolite ga u drugoj, pa zatim štakorima date ogrlicu natopljenu mirisom mačke, oni će instinktivno pobjeći i sakriti se.