Camboolian flat mathematics
From Tardis Wiki, the free Doctor Who reference
Camboolian flat mathematics was an advanced form of mathematics that was not known to 21st century humans.
According to the Fourteenth Doctor, humanity did not understand how something infinite like the universe could have an edge because they had not yet discovered Camboolian flat mathematics. When humanity eventually discovered it, they learned it was possible. (TV: Wild Blue Yonder)
