If It Quacks Like a Duck...
I can’t see how this could have happened without AI:
How do you paste another company’s email address into your reply if you’re an actual human composing that response? And if it’s a canned answer, the correct email address would already be pre-saved.
The reply from Obsidian didn’t make things any clearer and failed to refute the AI allegations, so I’ll apply a familiar maxim:
If it looks like AI, swims like AI, and quacks like AI, then it probably is AI.