Premise: Julius Caesar . Caesar became the first Roman general to cross both the Channel and the Rhine , when he built a bridge across the Rhine and crossed the Channel to invade Britain . Caesar refused the order , and instead marked his defiance in 49 BC by crossing the Rubicon with the 13th Legion , leaving his province and illegally entering Roman Italy under arms .
Hypothesis: Julius Caesar only crossed the Rubicon in 54 BC.
Label: CONTRADICTION