I think it depends on the cat. I mean I have five cats, all different intelligent levels. One cat, when someone knocks at the door, goes running to see who it is. Another can work out the most amazing things if you hide her toys, where as another wouldn't know his arse from his elbow lmao. Same with my mums dogs. One is stupid, but one is very very clever. 

There's an article on the bbc this morning that says cats have been proven to use their purrs manipulitely. I was like tell me something I don't know. One cat of mine, Scamp, I know the only time he comes for a genuine cuddle is when I'm in bed of a night. Any other cuddle during the day is for food, or letting outside. Morning ones, it's either 3 things. He wants to go out, he wants feeding or he's had an accident in the kitchen and he's apologising. I always hope it's the first two! Lol

"I didn't lose my mind, it was mine to give away"