Can you get a unicorn from the Retired Egg?

I'm curious, is it actually possible to acquire a unicorn from the Retired Egg? I've heard rumors that it's possible, but I'm not sure if it's just a myth or if there's actually some truth to it. I've seen a lot of people talking about it online, but no one seems to have a definitive answer. So, can you clarify for me, is it possible to get a unicorn from the Retired Egg, or is it just a figment of our imaginations?