フィクション中ではあるが、推理の根拠として使われている。
Jun 1, 1895年の「It is not an uncommon thing when a typewriter is out of order for two bars to fail to pass one another. 」
「It is not an uncommon thing when a typewriter is out of order for two bars to fail to pass one another. Thus, in writing 'emphasize' the rapid writer would strike the 'z' key before the 'i' had fully descended. The result would be that the 'z,' rising, would strike the 'i' bar and carry it up again, thus doubling the 'i,' instead of writing 'iz.' The repetition of the mistake was evidence that it was a faulty machine.
http://b.hatena.ne.jp/raycy/not%20an%20uncommon%20thing/ http://www26.atwiki.jp/raycy/pages/244.html」