Speak about probability and the future

Francesc: Ferran, can I ask you a question? I'm doing a survey
Ferran: Yes, if you like
Francesc: Right, the question is, 'Do you think the humans will desapear in 2012?
Ferran: Let me think... Yes, definitely yes. I think it'll be destroy the planet.
Francesc: I disagree with you. I think we must be positive. It'll probably not destroy.
Ferran: OK. What's the next question?
Francesc: The next question is