A cuil cannot be defined without a basis (0 cuils). The problem is, we cannot reach that level, and therefor, we cannot match certain abstract ideas to "n cuils."
The way I see it is like the Fibonacci sequence. Find a gif of it and you'll see that no matter what values you apply to any given point, the same value can be given to the same spiral one second later. So given that we don't know where 0 cuils is, can't anyone say that their level of abstractions is… Say,, 3 cuils? Because, someone else could just as easily claim that that person is only at 2 cuils. We have no basis to build this cuil theory on.
Of course, through the limit that exists in phi, you can easily calculate that the limit is infinite, and when the spiral finally hits that point, it will be at zero.
The problem is, working backwards, any value can be applied to the Fibonacci spiral, and the rest of the infinite spiral would be built off of this value.
The same problem is applicable to the cuil theory, in that the value for zero cuils, is Any value. Zero cuils is the absolute limit, but without it, there is no basis to use. At the same time, we cannot find the value for zero cuils, Because it is the limit.