On Sunday, Justin Bieber challenged Tom Cruise to join him in the octagon (the UFC ring) to solve a problem so fiendishly difficult no-one had previously bothered to think of it.
If a 25-year-old pop star stands 5ft 9in (175cm) and sells 150 million records, attracting 106 million Twitter followers, why does he randomly decide to try to goad a 56-year-old movie star into fighting him?
Needless to say, a calculation so onerous quickly won the attention of the very best minds the social media platform had to offer.
It is the contest Ultimate Fighting Championship (UFC) fans never knew they wanted.
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