Likelihood

River Song: "Not likely, maybe they attempted to create a time rift, but ended up opening a dimensional one." (GAME: A Trek to Skaro ^[+]Loading...["A Trek to Skaro (episode)"])

After realising that there was a tunnel drilled from the Torchwood base beneath the Thames Barrier Donna Noble wondered if it led to a world of dinosaurs, as in a film she'd seen, (TV: The Runaway Bride ^[+]Loading...["The Runaway Bride (TV story)"], PROSE: Doctor Who: The Encyclopedia ^[+]Loading...{"page":"13","ed":"2007 edition","1":"Doctor Who: The Encyclopedia (reference book)"}) "most likely" referring to At the Earth's Core. (PROSE: Doctor Who: The Encyclopedia ^[+]Loading...{"page":"13","ed":"2007 edition","1":"Doctor Who: The Encyclopedia (reference book)"})

After being informed by River Song that the Daleks seemed to be channelling a large amount of power to a particular building, Beckett Mariner remarked that she bet they weren't using it to power up a margarita machine, something which River agreed was "not likely". (GAME: A Trek to Skaro ^[+]Loading...["A Trek to Skaro (episode)"])

The Fourteenth Doctor believed it was not likely that a spaceship crash landing in London would jog Donna Noble's memory. (PROSE: The Doctor's Busiest Day ^[+]Loading...{"page":"9","1":"The Doctor's Busiest Day (short story)"})