Theory
"Theory" in Japanese
学説
gakusetsu
(a coherent set of statements attempting to explain observed phenomena)
学説
gakusetsu
(a field of study in mathematics)
定理
teiri
(a field of study in mathematics)
定理
teiri
(in logic: a set of axioms and all statements derivable from them)
憶測
okusoku
(an unproven conjecture)
推測
suisoku
(an unproven conjecture)
推論
suiron
(an unproven conjecture)
理論
riron
(a coherent set of statements attempting to explain observed phenomena)
理論
riron
(a field of study in mathematics)
見解
kenkai
(an unproven conjecture)
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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.