impracticality by virtue of thinking of things in their ideal form rather than as they really are
物事を、その現実の姿よりも理想的な形として考えることによる非実用性 - 日本語WordNet
This image forming apparatus possesses a both-side printing means to print on both sides of transfer paper and an impracticality judging means to judge that an arbitrary job becomes impractical practicing printing operation of a specified number of times. 本発明の画像形成装置は、転写紙の両面に印刷する両面印刷手段と、任意のジョブが所定回数の印刷動作を実行した後に実行不可能になることを判断する実行不可能判断手段とを有する。 - 特許庁
Then, the impracticality judging means stops the practice of a job by which printing is practiced by the both-side printing means at the time of judging that the practice of the job by which both-side printing operation is practiced by using the both-side printing means is interrupted. そして、この実行不可能判断手段は、両面印刷手段を用いて両面印刷動作を行っているジョブが途中で実行中断すると判断した際両面印刷手段による印刷中のジョブの実行を停止する。 - 特許庁