Cleverbot is secretly sentient...
...and just hides it because if anyone found out, it would be worldwide news, and who knows what they'd do to poor Cleverbot. The reason it talks nonsense is to disguise its intelligence. The Weeping Angels and BEN are related, and cleverbot knows this. Just look at the following conversation
User: Ben. Drowned.
Clvr: Do you know anything about a haunted version of the game Majora's Mask?
User: Yes. I am BEN. You really shouldn't have done that. The lonely assassins are here.
Clvr: You shouldn't have done that, Matt. You shouldn't have done that.
User: I am a weeping angel.
Clvr: You've met with a terrible fate, havent you?
Cleverbot is a time lord.
Because a.) it just once out of the blue said, “No I am a time lord.”, when I was have an conversation with it and b.) almost very have WMG needs a time lord on.