If continental plates and oceanic plates are moving around aimlessly, why were the continental plates ever all together to begin with? Isn’t that as unlikely as a mixture unmixing?

Question

If continental plates and oceanic plates are moving around aimlessly, why were the continental plates ever all together to begin with? Isn’t that as unlikely as a mixture unmixing?

In: Earth Science

Answer 1

Why would it be unlikely? Earth is a finite surface, completely tiled by the plates. Ignoring things like where these plates originated, the fact that they can’t jump over each other’s etc, any arrangement of plates is equally likely.