Exactly. Well illustrated, thank you.
One can play definition games all flipping day long and turn it into a poor quality highschool debate. Monopolists always attempt this in defence.
Whatever the correct definition is it has the same definition as google's attempt to do the same thing where it poured a multitude of resources and expertise into it and failed while facebook made billions in revenue.
No definitional games alter that fact. As long as the definition captures /that/ it's fine, but wholly unnecessary. And you can mess with definitions and have defintion debates in quagmire as long as you choose which is what every single monopolist wants and will pay lobbyists, lawyers and politicians to achieve that end to prevent the obvious and necessary action.