Get yourself into your DeLorean and go back to December 3 2014, when the iNNOCENCE and eXPERIENCE TOUR has just been announced.
Go find your past self all giddy and excited because of the tour, and have a really quick chat with him before coming back to July 14 2015.
He (your past self) can ask you 3 THREE 3 questions related to the tour.
You can answer straight forward, you can lie, you can evade the questions. It's up to you... what would you like your past self to know of what you already know about the tour.
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Now... why stay here? now jump into that DeLorean again and travel to December 3 but in 2016, when the 4th leg of the i+e tour is just getting over... or is it? did they tour in 2016 indeed? well... there's only one way to know.
Go find your future self and have a really quick chat with him before coming back to 2015.
You can ask him (your future self) 3 THREE 3 questions related to U2. We don't know what the answers would be, but we can know the questions.
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So, that's it.
*3 questions about U2 that your past self would've ask you and what would you have answered to him, and
* 3 questions about U2 that you would like to ask your future self.
