http://en.wikipedia.org/wiki/Dimension
By this notion, a line has a dimension of one because we do not need more than one value in order to define the exact location of 0-dimensional element on it.
In other words , n-dimension has n value, because we do not need more than n values in order to define the exact location of 0-dimension element on it.
So the ability to define an exact location w.r.t some dimension is determined by the number of values that are related to an 0-dimensional element, and if there is "no dimension" (according to The Man's reasoning) then no element exists and no value can be related.
n=1 to ∞
k=0 to n-1
The exact location of k-dimensional element is determined by no values that are related to an k-dimensional element, because k-dimensional element w.r.t k dimension is equivalent to that dimension. So we used 0 values to define the location of k-dimensional element w.r.t k dimension, and yet the k-dimensional element has a dimension, which is valued by k.
This is not the case with k-dimensional element w.r.t n dimension, exactly because n-dimension is non-local w.r.t any k-dimensional element.
In Mathematics ( http://en.wikipedia.org/wiki/Dimension )
The same holds in the case of a point (0-dimensional object) that exists w.r.t the 1-dimensional line.
"No dimension" does not exist w.r.t the 1-dimensional line, so 0-dimensional point is not equivalent to “No dimension”, and this is exactly the reason of why it is possible to define the location of 0-dimensional element w.r.t. 1-dimension, by using a single coordinate.
Your point?