How so? All your outoutput is now legally partly owned by Microsoft?
If I counter sign agreement, certainly. How do you think that sales of both movable and immovable property work?
But then neither do you, for every commit that was marked with copilot.
If a monkey uses a typewriter, there's no copyright.
If I use a typewriter with a monkey, I get copyright and the monkey doesn't.
Why would the monkey need copyright for me to get copyright?
Right, because monkeys cannot be granted copyright. If you use a typewriter along with Microsoft, the resulting copyright will be owned jointly.
This story isn't about a monkey claiming co-authorship, it's about Microsoft claiming co-authorship.