Deadpool 2: 10 Things That Make No Sense
7. Negasonic Teenage Warhead's Tech Know-How
Cable makes it clear that his time-travelling device only has enough power for two jumps, and there's nothing that can be done to change that. Negasonic Teenage Warhead, however, disagrees and manages to get more mileage out of it just in time to set up a series of insane post-credits sequences.
It doesn't ring true that Cable, a gadget man from the distant future, has no idea how to get the gizmo working again but a mutant teen who has never shown any prior aptitude for technology does.
Even if Negasonic Teenage Warhead had been established as a tech genius in the previous movie, the time travelling device would have been alien hardware to her. There's no way she could have known more about its repairability than Cable.