irrationality; something that is not reasonable or logical.
その手続きには非合理な点が多く、見直しが必要だ。
There are many irrational aspects to that procedure and it needs review.
感情的な判断が必ずしも非合理とは限らないが、説明は必要だ。
Emotional judgments are not necessarily irrational, but they do need explanation.
経営陣は非合理を排して効率化を図った。
The management eliminated irrational elements to improve efficiency.