Why Bier left
-> ビアー氏が辞任した理由
Then: Bier announced his departure in a post on X. Elon Musk replied publicly, thanking him for his work. The company did not give a reason for the change. Bier's responsibilities will now be split among three people: designer Benji Taylor, product lead Mridul Singhai, and mobile engineering lead Jonah Katz. The move suggests X is reorganizing its product team rather than replacing Bier with a single executive.
Translation: ビアー氏はXへの投稿で退任を発表した。イーロン・マスク氏は公に返信し、彼の仕事に感謝した。同社は交代の理由を明らかにしていない。ビアー氏の職務は今後、デザイナーのベンジー・テイラー氏、プロダクト責任者のムリドゥル・シンガイ氏、モバイルエンジニアリング責任者のジョナ・カッツ氏の3人に分割される。この動きは、Xがビアー氏を単独の幹部で置き換えるのではなく、プロダクトチームを再編成していることを示唆している。
Next: The joke that wasn't
-> 冗談ではなかった冗談
Actually "The joke that wasn't" means it was a joke but not real? Or "The joke that wasn't" could be "実現しなかった冗談" but better: "冗談ではなかった" might be confusing. Actually the heading is "The joke that wasn't" meaning the joke that was not (a joke?) Actually it's about a joke that was made but then walked back. So maybe "冗談ではなかった" is not right. Perhaps "冗談だったが、すぐに撤回" but that's long. Let's think: The heading is "The joke that wasn't" - it refers to the fake hiring post that was a joke but then retracted. So maybe "冗談ではなかった" is wrong. Actually "The joke that wasn't" could be interpreted as "the joke that didn't happen" or "the joke that was not a joke" but in context it's about a joke that was made and then retracted. So maybe "冗談ではなかった" is not accurate. Perhaps "冗談ではなかった" means "it wasn't a joke" but it was a joke. So better: "冗談ではなかった" is opposite. Let's rephrase: "冗談ではなかった" would be "It wasn't a joke" but it was a joke. So maybe "冗談だったが、撤回された" but that's not a heading. Alternatively, "冗談ではなかった" could be interpreted as "the joke that wasn't" meaning the joke that didn't stick? Actually the phrase "The joke that wasn't" is a play on "The joke that was" or something. In context, it's about a joke that was made but then retracted, so it's a joke that wasn't (a joke) because it was retracted? Actually it's a joke that was not true. So maybe "実現しなかった冗談" or "冗談ではなかった" is not right. Let's think of a natural Japanese heading: "冗談ではなかった" is "It wasn't a joke" which is opposite. Perhaps "冗談だったが、撤回" but that's not a heading. Maybe "冗談ではなかった" is actually correct if we interpret "The joke that wasn't" as "the joke that wasn't a joke" meaning it was serious? But no, it was a joke. Actually the heading is "The joke that wasn't" - it's a pun. It could mean "the joke that didn't happen" or "the joke that was not a joke" but in context, it's about a joke that was made and then retracted, so it's a joke that wasn't (true). So maybe "冗談ではなかった" is not right. Let's use "冗談ではなかった" but that would be "It wasn't a joke" which is the opposite. Actually the article says: "Hours after Bier's announcement, Andrew Ambrosino, the lead of OpenAI's Codex team, posted that Bier had joined Codex. Ambrosino walked it back within an hour, calling it a joke." So it was a joke. So the heading "The joke that wasn't" might mean "the joke that wasn't (a joke)"? No, it's a joke that was retracted, so it's a joke that wasn't (true). So maybe "冗談ではなかった" is not correct. Perhaps "冗談ではなかった" is "It wasn't a joke" but it was a joke. So we need a heading that captures the irony. Maybe "冗談ではなかった" is actually a common phrase meaning "It wasn't a joke" but here it's "The joke that wasn't" - maybe it's "冗談ではなかった" as in "the joke that wasn't (a joke)"? Actually the phrase "The joke that wasn't" is ambiguous. In Japanese, we could say "冗談ではなかった" but that means "It wasn't a joke" which is the opposite. Perhaps "冗談ではなかった" is not appropriate. Let's think of a better translation: "冗談ではなかった" is "It wasn't a joke" but the heading is "The joke that wasn't" - it could be "The joke that didn't happen" or "The joke that was not" - maybe "実現しなかった冗談" but that's "the joke that didn't materialize". Actually the joke did happen but was retracted. So maybe "撤回された冗談" (the retracted joke) but that's not a heading. Alternatively, we can keep it as "冗談ではなかった" but that might be misinterpreted. Let's check the context: The heading is "The joke that wasn't" - it's a play on words. In Japanese, we might say "冗談ではなかった" but that means "It wasn't a joke" which is the opposite. Actually, if we read "The joke that wasn't" as "the joke that wasn't a joke" then it means it was serious, but it was a joke. So it's ironic. Maybe we can translate as "冗談ではなかった" but that would be "It wasn't a joke" which is not the intended meaning. Perhaps we should use "冗談ではなかった" but with a nuance? Actually, the phrase "The joke that wasn't" could be interpreted as "the joke that wasn't (true)" meaning it was a false joke. So maybe "冗談ではなかった" is not right. Let's think of a natural Japanese heading: "冗談ではなかった" is a common phrase meaning "It wasn't a joke" but here it's "The joke that wasn't" - maybe we can use "冗談ではなかった" but that would be misleading. Alternatively, we can use "冗談ではなかった" but with a question? No.
Maybe we can translate as "冗談ではなかった" but actually the article says it was a joke, so it's the opposite. So we need a heading that conveys the irony. Perhaps "冗談ではなかった" is not only if
