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換位 (かんい, kani) Japanese meaning: conversion (logic) | Kotomora

換かん位い

か

ん

い

Meanings

1

conversion (logic)

Technical term in logic: the transposition of subject and predicate to form a new proposition. Rare outside academic contexts.

「すべてのAはBである」の換かん位いは「あるBはAである」となる。
The conversion of 'All A are B' becomes 'Some B are A'.

Kanji

換interchange, period, change
位rank, grade, throne

Word family

換かん質しつ換かん位い
contraposition

Etymology

Compound of 換 (exchange, change) and 位 (position, rank), literally 'exchange of positions'. The exact historical derivation is uncertain; the term is used in logic to describe the transposition of subject and predicate.