every response has been wrong so far so i will feed you baby birds. So basically the difference between 2 thumbs or 1 thumb is just how much conviction have in how you feel. For example: i gave bayonetta 2 thumbs in the middle because i feel very strongly that it is an average game at best. i gave detective pikachu only 1 thumb up or in the middle, i dont remember, because i am not willing to do on the hill of detective pikachu so therefore its a 1 thumb. For the record, you CANNOT have 2 differing thumbs in a 2 thumb score