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恒真式 (koushinshiki) Japanese meaning: tautology | Kotomora

恒こう真しん式しき

こ

う

し

ん

し

き

Meanings

1

In logic, a proposition that is always true regardless of the truth values of its components.

「PまたはPでない」は恒こう真

しん

式しき

の

一いち

例れい

です

。

'P or not P' is an example of a tautology.

Kanji

恒constancy, always
真true, reality, Buddhist sect
式style, ceremony, rite

Related words

恒こう偽ぎ式しき
恒偽式 is a contradiction (always false), while 恒真式 is always true.
トートロジー
トートロジー is the loanword equivalent, often used in both logical and rhetorical contexts.

Etymology

Compound of 恒 (constant) + 真 (true) + 式 (formula). The term is a direct translation of the English 'tautology' in a logical context.