Black-or-White
The Fallacy
Where two alternative states are presented as the only possibilities, when in fact more possibilities exist.
Why it's wrong
Also known as the false dilemma, this insidious tactic has the appearance of forming a logical argument, but under closer scrutiny it becomes evident that there are more possibilities than the either/or choice that is presented.
Example
Whilst rallying support for his plan to fundamentally undermine citizens' rights, the Supreme Leader told the people they were either on his side, or on the side of the enemy.