対たい偶ぐう

noun

pair; couple

Refers to two things that form a pair or are considered together. Often used in formal or technical contexts, but can appear in everyday language.

• この二ふたつの概がい念ねんは対たい偶ぐうをなしている。

  These two concepts form a pair.

noun

contraposition

A term in logic referring to the relationship between a conditional statement and its contrapositive. Used in mathematics and philosophy.

• ある命めい題だいの対たい偶ぐうを考かんがえると、証しょう明めいしやすくなることがある。

  Considering the contrapositive of a proposition can sometimes make it easier to prove.