Anchor: This bold guess about the solutions to a certain complex-valued infinite series (made by the incomparable Bernhard Riemann in 1859) would, if true, have far-reaching implications for the structure of the most basic of entities, the natural numbers.
Entailed: Should this guess about how some infinite series might be solved prove true, there could be big implications about the natural numbers.
Contradiction: This careless guess, which has never been made before, is flawed and is rather meaningless.
Contradiction: A girl is playing basketball.
Contradiction: A woman holds a glass.
Contradiction: People are standing in the desert.
Contradiction: Four people are in a library.