User blog comment:Sbiis Saibian/Googology101 - Part I/@comment-1605058-20141023055529/@comment-1605058-20141023152009

Now you made it entirely clear, I comletely forgot we are talking about "practical" naming of the numbers! Sorry for that.

In that case, your conjecture is actually quite reasonable, however, I'm unsure if it's not the case that every sufficiently large number is unnamable, which makes it pretty much vacuously true.