it's impossible to make an argument that any WR other than Jerry Rice is the GOAT.
The Alien Test.
Aliens have invaded Earth. They are inclined to destroy the planet, but they love football and so they've made a deal with us that we can borrow their time machine and go back and get players in their prime for the game. If we win, the planet is spared. If we lose, planet destroyed.
Who is the first receiver that you get? Me, I go back to 2003 and grab Randy Moss. And why? Well because the fate of the world is at stake. And Randy Moss is uncoverable.