Connor has seniority
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Jokes aside, it’s probably easier for the cat to learn to ignore “Human Connor” than it is to learn a new name for themselves, right?
One time, I got a job at a large, chain electronics store as a warehouse associate. They already had a guy there named Tim, but they immediately decided that they liked me more than him, and renamed that Tim (that worked there for 2 years) to “Other Tim.”
I'm not sure, maybe we underrate them. I knew of a dog that also answered to being called by two different names, it was so amusing when I saw it.
It’s probably easier for the human to recognise “Human Connor” than it is for the cat to learn a new name, right?