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Can you explain what it means to "deny the existence" of someone? I see this expression often, but I'm genuinely puzzled by what it means in practice. I agree with you that "purposely misgendering one's colleagues" should lead to firing, but I think this article isn't about that. It's about people who are tolerant of others and in general try to be nice people, but just disagree about certain things - for example, ho…
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Of course, like all things related to politeness, there is no absolute rule - if I change my pronouns every week I shouldn't expect people to keep up. But it should not be surprising that you can be fired for not making a minimal effort to be nice to your colleagues.