Coincidence

According to Romana II, coincidences were a statistical inevitability, and they were bound to happen sometimes. (AUDIO: Subterranea) The Eleventh Doctor claimed to believe that coincidences were what the universe did for fun. (TV: Closing Time)

Statistically, events on their own would be considered potential coincidences or anomalies until checked against similar examples. (TV: Adrift) Greater degrees of recurrence tended to suggest that apparent anomalies might be connected, and hence were not coincidences. (AUDIO: The Thirteenth Stone)

Some people did not believe in coincidences at all. (TV: The End of Time)

The Eleventh Doctor was known to make discoveries or deductions by paying great attention to apparent coincidences. He reminded himself, "Never ignore a coincidence, unless you're busy. In which case, always ignore a coincidence." (TV: The Pandorica Opens)

Claims were sometimes made that patterns were mere coincidences in order to cover up a secret, even a conspiracy. (TV: Adrift)