You can't be the best

Correct. The slot has already been filled. There's one spot available and, like, I am the guy so...

Hym "He's right! You can't be the best. I am already that... Forever... And even if I had never existed... The fact that I COULD HAVE theoretically exist and would have been better means that I'm still theoretically better than you would be in my absence... So, Yeah... Both physically and theoretically impossible."