二者択一

1. Origins, structure, and basic meaning

• Structure: 二者択一, read にしゃたくいつ, means choosing one of two alternatives.
• Basic usage: Use it for either-or decisions, such as opposing positions or two modes of transport.

2. Common pitfalls and similar expressions

• Not limited to two people
  • 二者 can refer to two positions, methods, or options as well as two people.
• Compared with choice in general
  • 選択 is choice more broadly, while 二者択一 limits it to one of two alternatives.
  • The example also shows an issue that cannot be resolved through such a binary choice alone.