理論

1. Origins, structure, and basic meaning

• Structure: 理論 is a noun read りろん, meaning a theory or systematic framework for explaining facts and phenomena.
• Basic usage: It can be tested through an experiment or evaluated according to whether sufficient evidence supports it.
  • 講義で学んだ理論を簡単な実験で確かめました。 says that the theory learned in a lecture was checked with a simple experiment; 彼の理論は興味深いものの、まだ十分な証拠がありません。 says that his theory is interesting but still lacks sufficient evidence.

2. Common pitfalls and similar expressions

• 実験で確かめる
  • で marks the simple experiment as the means used to check the theory.
• 興味深いものの
  • ものの connects the theory's interest with the contrasting lack of evidence.
• 理論 and 仮説
  • 仮説 is a tentative explanation proposed for testing, while 理論 is a systematic explanatory framework.